The Circle and the Cross December 21, 2012 by teofilo

Size: px
Start display at page:

Download "The Circle and the Cross December 21, 2012 by teofilo"

Transcription

1 The Circle and the Cross December 21, 2012 by teofilo Quartered Circle at Three Rivers Petroglyph Site Today is a momentous day, of course. As the winter solstice, it marks the fourth anniversary of this blog. It also might be an important date in the Maya Long Count (although opinions differ). It s not the end of the world, which should be apparent by now. In recognition of the Maya date and my general practice of blogging about archaeoastronomy on significant celestial events, I thought I d write about a couple of papers focusing on a Mesoamerican symbol with apparent astronomic significance and a thought-provoking connection to the Southwest. The first paper, published in 1978 in Science, was written by Anthony Aveni and two co-authors (one of whom appears to have been one of his students). Aveni is a prominent figure in archaeoastronomy, especially of Mesoamerica, and was one of the first researchers to do careful measurements of astronomical alignments at ancient sites. In this paper he and his co-authors discuss a symbol found at several Mesoamerican sites consisting of a cross concentric with one or more circles, with the arms of the cross usually extending beyond the circle(s). These symbols were usually made by pecking a series of dots into either a rock face or the floor of a room, and their alignments appear to have often been significant. They are most common at Teotihuacan, where they were generally oriented with the arms of the cross aligned with the city s street grid. This

2 orientation had led some earlier authors to interpret them as surveying marks used in laying out the streets. The authors of this paper consider that interpretation a possibility, but not necessarily the only one. There are other examples of these symbols in sites near Teotihuacan that have other orientations, some of which seem to align with prominent landmarks on the horizon that may have been used in astronomical observations. Aveni et al. also make a big deal out of the number of dots from which these figures are made, which is quite consistent in many cases with the total often tantalizingly close to 260, the number of days in the pan-mesoamerican ritual calendar. There may be something to this, but as is often the case with these numerological theories there s a question of how close is close enough. (This also applies to alleged astronomical alignments.) They kind of throw a whole slew of interpretations at the numbers of dots in various parts of various examples; some of these may be meaningful, but it seems doubtful that all of them are at the same time. A more interesting pattern is the geographical distribution of these apparently rare symbols. While they are most numerous in and around Teotihuacan, they are also present surprisingly far afield: as far south as the Maya cities of Uaxactun and as far north as the area of Alta Vista near the Tropic of Cancer. While widespread, these are all areas known to have been influenced by Teotihuacan during its period of greatest power, and the authors make the reasonable suggestion that the pecked cross symbol was associated with this influence. In trying to interpret its meaning, they note similarities to diagrams of Mesoamerican calendars (which are indeed intriguing), as well as the previously mentioned idea that they were orientational devices for surveying, and even the resemblance to descriptions of the holes pecked into house floors as boards for the game patolli in Conquest-era sources. It s quite possible that they were all of these, of course, or that different examples had different functions. The main conclusion the authors come to is that they are associated strongly with Teotihuacan in some fashion. An article in American Antiquity two years later made an effort to flesh out what that connection might have been. Written by the Mayanist Clemency Coggins, this article interprets the cross-in-circle motif in Mesoamerica as an example of a larger class of four-part figures that are associated primarily with the sun, especially with its daily cycle through the sky as well as its yearly cycle. Coggins notes various examples of Maya hieroglyphs and other symbols that have the form of quartered circles or crosses and pushes back against earlier interpretations of them as referring to the cardinal directions. Indeed, she argues that the Maya didn t even really have a concept of cardinal directions comparable to the European one: instead, they had two directions that mattered, east and west, where the sun rises and sets, with accompanying symbolism. The

3 areas in between sometimes had symbolism associated with them, but they usually functioned as stand-ins for up (north) and down (south), which were much more symbolically charged. Coggins sees the quartered circle as representing the daily movement of the sun and as properly interpreted vertically rather than horizontally. Thus, the four points stand for sunrise, zenith, sunset, and nadir, not east, north, west, and south. The position of the sun at zenith (directly overhead) was an important phenomenon for the Maya and probably other Mesoamericans; it only happens in the Tropics and is a foreign concept to societies in temperate zones. Coggins interprets an early structure at Uaxactun, a pyramidal platform with four stairways, as a symbol of this four-part idea. She argues that its function was likely as a solar observatory, as the three small temples to the east line up with the positions of the sunrise on the solstices and equinoxes viewed from it. This same group of buildings is also noteworthy in that three stelae erected there commemorate the endings of twenty-year periods known as k atuns, and two of them are the earliest known examples of stelae marking this sort of calendrical event. (Or at least they were at the time Coggins was writing; I don t know if this is still the case, but if earlier k atun-marking stelae have been found since then that would undermine her argument somewhat, as explained below.) The event we are (maybe) observing today is the ending of a much longer cycle known as a bak tun, but is conceptually similar. Coggins distinguishes these calendric celebrations and monuments from historic ones tied to important events in the lives of kings. She argues that the latter were the focus of all previous monuments and indicate a focus on royal dynasties and the private rituals of the nobility in Maya political life, whereas the celebration of the end of a k atun and the erection of a monument commemorating it is a more public, popular, universal sort of ritual less focused on the glory of particular lineages and kings.

4 Highly Elaborated Quartered Circle at Three Rivers Petroglyph Site But what does all this have to do with quartered circles? Well, Coggins notes that shortly after these two stelae were erected in Uaxactun (in AD 357), another stela at Uaxactun shows an individual with non-maya costume and weapons more associated with central Mexico, which at this time would have been dominated by Teotihuacan. This stela also refers to the nearby city of Tikal, which is well known to have seen extensive central Mexican influence at this time, including a king named Curl Snout who was apparently at least partly Mexican himself. This is also the period when the pecked cross at Uaxactun discussed by Aveni et al. was likely made, and here we see some supporting evidence for their theory that the pecked crosses are associated with the expansion of Teotihuacano influence. The first k atun ending stela at Tikal was erected by Curl Snout and marks the first k atun ending of his reign (in AD 396). Coggins concludes from this association between Mexican influence and the celebration of k atun endings that the latter practice was introduce as part of the former phenomenon. She supports this idea in part with the clear evidence that the god Tlaloc was of considerable importance to these Mexicans in the Maya country, which is unsurprising since he was probably the most important god at Teotihuacan itself. Tlaloc is a god of rain, which was very important to agricultural people in the Valley of Mexico, which is high and relatively dry (at least compared to the lush Maya Lowlands). He was associated as well with the celebration of the solar

5 year, the cycles of which are closely connected to seasonal changes in rainfall patterns among many agricultural societies. This may account for the prevalence of the pecked cross/quartered circle motif at Teotihuacan, if as Coggins implies it symbolized not just the solar day but the solar year as well. Apparently some of the Tlaloc images in Curl Snout s tomb at Tikal had similar symbols on their headdresses, so the association between the god and the symbol seems wellsupported regardless of its origin. Coggins interprets Curl Snout as having introduced a Tlaloc cult to Tikal, presumably from Tenochtitlan, which involved the celebration of the solar year and the sidelining of the old rituals of the established noble lineages that had previously been the focus of Maya official religion. This cult apparently also included the celebration of the twenty-year k atuns, though Coggins never gives a good explanation for why this would have been the case. Over time the Mexican kings apparently became assimilated to Maya culture, and Tlaloc was similarly conflated with the Maya rain god Chac, but the celebration of k atuns continued and by Late Classic times it involved special complexes of paired pyramids with four stairways each, much like the early structure at Uaxactun but on a much grander scale. These were paired on the east and west sides of a plaza and apparently used primarily for the celebration of k atun endings. The north and south sides often had smaller structures with celestial and underworld symbolism respectively, consistent with the idea that they represented zenith and nadir. All of this is best known from Tikal, but Coggins notes that there are some indications from other sites such as Uaxactun and Yaxha that similar processes of Mexican influence and a shift to k atun celebration occurred similarly. That s the story Coggins tells, anyway. It s an interesting one, and somewhat convincing at least in some of its broad strokes, but I can t help thinking that Maya archaeology has come a long way since 1980, especially with a better ability to understand the writing system, and I wonder if Coggins s historical interpretations, based on essentially art-historical methods, still hold up. In any case, the association between Teotihuacan, Tlaloc, and the quartered circle is the key thing I take away from this paper, and that probably holds up better than the political history. The association is important because there s another place that is known for its quartered circles, one which is not mentioned at all in either of these papers. That s probably because it s very far away from both Teotihuacan and Tikal.

6 Complex Panels at Three Rivers Petroglyph Site Three Rivers in southern New Mexico is one of the most spectacular petroglyph sites in the whole Southwest. It s one of the most important locations for rock art of the Jornada Style, associated with the Jornada Mogollon culture that existed in south-central New Mexico and adjacent West Texas from about AD 1050 to Unlike the rock art of the Anasazi area further north, including Chaco, which was highly stylized and repetitive, Jornada Style rock art is astonishingly naturalistic and elaborate. It is full of lifelike human faces and masks, animals with fully realized eyes and teeth, and imagery that is often remarkably Mesoamerican. The examples of parallels to Mexican art are numerous and fairly obvious, and not very surprising given the Jornada s southerly location and proximity to the very Mesoamerican-seeming center of Casas Grandes, which flourished during this same period. What s more surprising is the similarity between the Jornada Style and the later Rio Grande Style further north, which contains many of the same symbols and stylistic conventions. This implies that the Jornada served as a conduit for Mesoamerican ideas to the later Pueblos. Polly and Curtis Schaafsma have argued, convincingly in my view, that the kachina cult that is so important among the modern Pueblos originated among the Jornada, citing the masks and other symbols in Jornada rock art as their main line of evidence. Kachinas are rain spirits, and as Polly Schaafsma notes in her book on

7 Southwestern rock art, the kachina cult bears many notable similarities to the Tlaloc cult in Mexico. And, indeed, one of the most common motifs in Jornada rock art is the goggle eyes that are among Tlaloc s standard attributes further south. Other Mexican gods such as Quetzalcoatl appear to be present in the Jornada petroglyphs as well, and Tlaloc is surely not the only deity who was transmitted in altered form to the Pueblos, but given the importance of rain in the arid Southwest the appeal of a rain cult is obvious. What about the quartered circle? As we saw from the first two papers, this symbol was certainly associated strongly with Teotihuacan, where Tlaloc was the most important god, and it was probably associated to at least some degree with Tlaloc himself, whose popularity in Mexico lasted much longer than Teotihuacan s political power and cultural influence. And yet, the quartered circle is virtually absent from the Southwest. Simple crosses, often outlined, are common, but they are generally interpreted as stars and typically associated with the Feathered Serpent, which is probably a version of Quetzalcoatl. The cross and circle, however, is almost never seen in the Southwest, except in one place: Three Rivers. Two Quartered Circles at Three Rivers Petroglyph Site Schaafsma says in her book that what she calls the circle-dot motif is actually the most common element at the site, citing an obscure unpublished manuscript. It s not clear how she defines this motif, as there are many petroglyphs at Three

8 Rivers that consist of circles surrounded by dots, with the inside of the circle sometimes blank, sometimes filled with a larger dot, sometimes filled with a series of concentric circles, but often filled with a cross. (The illustration in Schaafsma s book for this motif shows one of the crosses.) These quartered circles, usually but not always surrounded by dots, are very prominent at the site. What s striking about this is how unique they are to this one site, especially given the importance of similar symbols in Mesoamerica as documented by Aveni et al. and Coggins. Aveni et al. actually mention some similar symbols in the rock art of California and Nevada, but they seem to have been unaware of the Three Rivers examples. The dots are especially interesting, given that the Teotihuacan examples are made of dots. That isn t the case here, but the dots are clearly important. They give a solar feel to many of the symbols, especially those with concentric circles, which ties in to Coggins s interpretation of the symbol as reflecting the passage of the sun. And remember those Tlalocs with their goggle eyes, present at Three Rivers as well as at virtually every other Jornada Style site. They clearly show not only that Mesoamerican religious symbols could and did travel this far north, but that the specific god associated with the quartered circle elsewhere was among the most prominent examples. So what s the explanation here? I confess that I don t have one except to suppose that this symbol was of particular importance to the people who made the petroglyphs at Three Rivers, probably primarily people who lived at the contemporaneous village site nearby. I think it s quite likely that this was a symbol particularly associated with that community, or perhaps with a specific social group within it, and that it is ultimately connected in some way to the symbols further south. Note that some of the pecked crosses described by Aveni et al. were quite far north in Mexico, some near the Tropic of Cancer and one described in a nineteenth-century source as being near the US border (though its exact location is unknown). The latter in particular would probably more or less close the geographic gap between the others and Three Rivers, while the examples near the Tropic of Cancer may have been associated with the nearby site of Alta Vista, which was occupied at a time that would fill much of the temporal gap between Teotihuacan and Three Rivers as well. It s certainly hard to come to firm conclusions about things like this, of course, and the fact that the quartered circle doesn t appear to have spread from Three Rivers to any other Jornada Mogollon groups or to the later Pueblos is problematic. Still, it s a fascinating little glimpse into the complexity of the past and the possibilities that emerge from careful study and an open mind. Aveni, A., Hartung, H., & Buckingham, B. (1978). The Pecked Cross Symbol in Ancient Mesoamerica Science, 202 (4365), DOI: /science Coggins, C. (1980). The Shape of Time: Some Political Implications of a Four-Part Figure American Antiquity, 45 (4) DOI: /280144

For most observers on Earth, the sun rises in the eastern

For most observers on Earth, the sun rises in the eastern 632 CHAPTER 25: EARTH, SUN, AND SEASONS WHAT IS THE SUN S APPARENT PATH ACROSS THE SKY? For most observers on Earth, the sun rises in the eastern part of the sky. The sun reaches its greatest angular altitude

More information

FOR DISCUSSION TODAY: THE ANNUAL MOTION OF THE SUN

FOR DISCUSSION TODAY: THE ANNUAL MOTION OF THE SUN ANNOUNCEMENTS Homework #1 due today at end of class. HW #2 due next Thursday. Homework #1 question #1 and Homework #2 meridian slice questions will be discussed in the course of the lecture today. Observing

More information

Geography Class 6 Chapters 3 and

Geography Class 6 Chapters 3 and CHAPTER 3 MOTIONS OF THE EARTH The Earth is always travelling in Space. That makes each person on Earth, a Space Traveller. No one feels the movement of the Earth because humans are too tiny when compared

More information

STONEHENGE AS A SOLSTICE INDICATOR

STONEHENGE AS A SOLSTICE INDICATOR STONEHENGE AS A SOLSTICE INDICATOR One of the most impressive megalithic structures in the world is Stonehenge just north of Salisbury, England. I first visited the monument during my post-doctorate year

More information

Seasons ASTR 101 2/12/2018

Seasons ASTR 101 2/12/2018 Seasons ASTR 101 2/12/2018 1 What causes the seasons? Perihelion: closest to Sun around January 4 th Northern Summer Southern Winter 147 million km 152 million km Aphelion (farthest to Sun) around July

More information

SOLSTICE PROJECT RESEARCH. Pueblo Bonito Petroglyph On Fajada Butte: Solar Aspects

SOLSTICE PROJECT RESEARCH. Pueblo Bonito Petroglyph On Fajada Butte: Solar Aspects SOLSTICE PROJECT RESEARCH Papers available on this site may be downloaded, but must not be distributed for profit without citation. Pueblo Bonito Petroglyph On Fajada Butte: Solar Aspects By Anna Sofaer

More information

Objectives. Duration: one week

Objectives. Duration: one week Objectives At the conclusion of the lesson, students will be able to: 1. Analyze data to describe the motion of the sun including equinox and solstice paths in the sky for an Ancient Culture 2. Use alt-azimuth

More information

Name. Astronomy Packet 2. 1) The Mayans tracked which celestial bodies.. The individuals who

Name. Astronomy Packet 2. 1) The Mayans tracked which celestial bodies.. The individuals who Name Astronomy Packet 2 1) The Mayans tracked which celestial bodies. The individuals who performed this were known as. The study of these events allowed Mayans to track time in different ways. The is

More information

PHYSICS 107. Lecture 4 Ancient Astronomy

PHYSICS 107. Lecture 4 Ancient Astronomy PHYSICS 107 Lecture 4 Ancient Astronomy Introduction Astronomy is the oldest science. There are astronomical artifacts going back 8000 years. Many ancient cultures on every continent seem to have had examples

More information

StoneHenge. (Neolithic-Period)

StoneHenge. (Neolithic-Period) StoneHenge (Neolithic-Period) Stonehenge, England Stonehenge, the most visited and well known of the British stone rings, is a composite structure built during three distinct periods. In Period I (radiocarbon-dated

More information

AST101: Our Corner of the Universe Lab 1: Stellarium and The Celestial Sphere

AST101: Our Corner of the Universe Lab 1: Stellarium and The Celestial Sphere AST101: Our Corner of the Universe Lab 1: Stellarium and The Celestial Sphere Name: Student number (SUID): Lab section: Group Members: 1 Introduction Following the prelab, you should be now acquainted

More information

Discovering the Night Sky

Discovering the Night Sky Discovering the Night Sky Guiding Questions 1. What role did astronomy play in ancient civilizations? 2. Are the stars that make up a constellation actually close to one another? 3. Are the same stars

More information

Discovering the Night Sky

Discovering the Night Sky Guiding Questions Discovering the Night Sky 1. What role did astronomy play in ancient civilizations? 2. Are the stars that make up a constellation actually close to one another? 3. Are the same stars

More information

Knowing the Heavens. Chapter Two. Guiding Questions. Naked-eye (unaided-eye) astronomy had an important place in ancient civilizations

Knowing the Heavens. Chapter Two. Guiding Questions. Naked-eye (unaided-eye) astronomy had an important place in ancient civilizations Knowing the Heavens Chapter Two Guiding Questions 1. What role did astronomy play in ancient civilizations? 2. Are the stars that make up a constellation actually close to one another? 3. Are the same

More information

Q25: Record the wavelength of each colored line according to the scale given.

Q25: Record the wavelength of each colored line according to the scale given. C. Measurement Errors and Uncertainties The term "error" signifies a deviation of the result from some "true" value. Often in science, we cannot know what the true value is, and we can only determine estimates

More information

The seasons. Astronomy 101 Syracuse University, Fall 2017 Walter Freeman. September 11, Astronomy 101 The seasons September 11, / 24

The seasons. Astronomy 101 Syracuse University, Fall 2017 Walter Freeman. September 11, Astronomy 101 The seasons September 11, / 24 The seasons Astronomy 101 Syracuse University, Fall 2017 Walter Freeman September 11, 2017 Astronomy 101 The seasons September 11, 2017 1 / 24 Winter is coming. Watchwords of House Stark (A Song of Ice

More information

Meridian Circle through Zenith, North Celestial Pole, Zenith Direction Straight Up from Observer. South Celestial Pole

Meridian Circle through Zenith, North Celestial Pole, Zenith Direction Straight Up from Observer. South Celestial Pole Chapter 3 How Earth and Sky Work- Effects of Latitude In chapters 3 and 4we will learn why our view of the heavens depends on our position on the Earth, the time of day, and the day of the year. We will

More information

SUB-PROBLEM 2: HOW DO SUN AND EARTH MOVE FOR THE EXISTING CYCLES AND SYMMETRIES TO OCCUR? (The invention of a Sun/Earth model)

SUB-PROBLEM 2: HOW DO SUN AND EARTH MOVE FOR THE EXISTING CYCLES AND SYMMETRIES TO OCCUR? (The invention of a Sun/Earth model) SUB-PROBLEM 2: HOW DO SUN AND EARTH MOVE FOR THE EXISTING CYCLES AND SYMMETRIES TO OCCUR? (The invention of a Sun/Earth model) We have made several advancements in the problem of interest proposed at the

More information

Chapter 4 Earth, Moon, and Sky 107

Chapter 4 Earth, Moon, and Sky 107 Chapter 4 Earth, Moon, and Sky 107 planetariums around the world. Figure 4.4 Foucault s Pendulum. As Earth turns, the plane of oscillation of the Foucault pendulum shifts gradually so that over the course

More information

Earth s Rotation. reflect

Earth s Rotation. reflect reflect In ancient Greece, people believed that powerful gods were responsible for all things that happened in nature. The Greeks believed that Helios, the Sun god, drove his fiery chariot from one end

More information

Ancient astronomical observatories

Ancient astronomical observatories FUTURE OF THE PAST: ICTS Mini Workshop, Mangalore, 22-26, 2011 Ancient astronomical observatories Srikumar M. Menon Manipal University, Manipal Stonehenge Nilaskal The Fascinating Heavens the sky as a

More information

Name: Date: Period: #: Chapter 1: Outline Notes What Does a Historian Do?

Name: Date: Period: #: Chapter 1: Outline Notes What Does a Historian Do? Name: Date: Period: #: Chapter 1: Outline Notes What Does a Historian Do? Lesson 1.1 What is History? I. Why Study History? A. History is the study of the of the past. History considers both the way things

More information

Where, on Earth, are you?

Where, on Earth, are you? Where, on Earth, are you? We all live on a big planet called Earth, of course. But where on Earth? And if you want to go to a different spot on Earth other than the spot you are in, how do you know which

More information

(1) Over the course of a day, the sun angle at any particular place varies. Why?

(1) Over the course of a day, the sun angle at any particular place varies. Why? (1) Over the course of a day, the sun angle at any particular place varies. Why? (Note: Although all responses below are true statements, only one of them actually explains the observation!) (A)The sun

More information

The Earth-Moon-Sun System

The Earth-Moon-Sun System chapter 7 The Earth-Moon-Sun System section 2 Time and Seasons What You ll Learn how to calculate time and date in different time zones how to distinguish rotation and revolution what causes seasons Before

More information

Student Exploration: Seasons: Earth, Moon, and Sun

Student Exploration: Seasons: Earth, Moon, and Sun Name: Date: Student Exploration: Seasons: Earth, Moon, and Sun Vocabulary: altitude, axis, azimuth, equinox, horizon, latitude, revolution, rotation, solstice Prior Knowledge Questions (Do these BEFORE

More information

Grade 7: Sample Social Studies Extended Response Questions

Grade 7: Sample Social Studies Extended Response Questions : Sample Social Studies Extended Response Questions The following is a sample of a social studies extended response question with a range of student answers. These answers were written by Tennessee students

More information

The History of Astronomy

The History of Astronomy The History of Astronomy http://www.phys.uu.nl/~vgent/babylon/babybibl_intro.htm http://mason.gmu.edu/~jmartin6/howe/images/pythagoras.jpg http://www.russellcottrell.com/greek/aristarchus.htm http://www.mesopotamia.co.uk/astronomer/homemain.html

More information

Earth s Rotation. How often does the day-and-night cycle occur on Earth?

Earth s Rotation. How often does the day-and-night cycle occur on Earth? How often does the day-and-night cycle occur on Earth? Earth moves through space in several important ways. One type of motion is called rotation. A rotation is a spin around a center. For example, imagine

More information

4.6 Stars. Star Patterns

4.6 Stars. Star Patterns 4.6 Stars Star Patterns If you have ever looked up at the night sky in winter, you probably would recognize the pattern of stars below. The Ancient Greeks named this pattern of stars Orion, after the giant

More information

Physics 312 Introduction to Astrophysics Lecture 3

Physics 312 Introduction to Astrophysics Lecture 3 Physics 312 Introduction to Astrophysics Lecture 3 James Buckley buckley@wuphys.wustl.edu Lecture 3 Celestial Coordinates the Planets and more History Reason for the Seasons Summer Solstice: Northern Hemisphere

More information

THE GREAT SUN-EARTH-MOON LINE-UP

THE GREAT SUN-EARTH-MOON LINE-UP NAME DATE PARTNERS THE GREAT SUN-EARTH-MOON LINE-UP Activity 1: Where Do Lunar Phases Come From? The phases of the moon have fascinated people for thousands of years. They have appeared in myths, art,

More information

2. Knowing the Heavens

2. Knowing the Heavens 2. Knowing the Heavens Ancient naked-eye astronomy Eighty-eight constellations The sky s ever-changing appearance The celestial sphere Celestial coordinates Seasons: Earth s axial tilt Precession of Earth

More information

HISTORY OF ASTRONOMY, PART 1. How our understanding of the Universe has changed

HISTORY OF ASTRONOMY, PART 1. How our understanding of the Universe has changed HISTORY OF ASTRONOMY, PART 1 How our understanding of the Universe has changed Focus Question: How and why has our understanding of the universe changed over time? The oldest science? As far back as the

More information

ASTRO Fall 2012 LAB #2: Observing the Night Sky

ASTRO Fall 2012 LAB #2: Observing the Night Sky ASTRO 1050 - Fall 2012 LAB #2: Observing the Night Sky ABSTRACT Today we will be calibrating your hand as an angular measuring device, and then heading down to the planetarium to see the night sky in motion.

More information

Astronomy 103: First Exam

Astronomy 103: First Exam Name: Astronomy 103: First Exam Stephen Lepp September 21, 2010 Each question is worth 2 points. Write your name on this exam and on the scantron. Short Answer Mercury What is the closest Planet to the

More information

HOW TO TRAVEL ON EARTH WITHOUT GETTING LOST

HOW TO TRAVEL ON EARTH WITHOUT GETTING LOST HOW TO TRAVEL ON EARTH WITHOUT GETTING LOST Using a globe to learn how a position on Earth can be described. Rui Dilão, Instituto Superior Técnico Curriculum topic latitude, longitude, coordinate system

More information

18.2 Earth Cycles Days and years Calendars Years and days Leap years Calendars throughout human history 20,000 years ago. 7,000 BC. 4,000 BC.

18.2 Earth Cycles Days and years Calendars Years and days Leap years Calendars throughout human history 20,000 years ago. 7,000 BC. 4,000 BC. 18.2 Reading 18.2 Earth Cycles Do you ever wonder where our calendar comes from? Or why the Moon gradually changes its shape? Or why we have seasons? The answers have to do with the relative positions

More information

Lecture 2: Motions of the Earth and Moon. Astronomy 111 Wednesday August 30, 2017

Lecture 2: Motions of the Earth and Moon. Astronomy 111 Wednesday August 30, 2017 Lecture 2: Motions of the Earth and Moon Astronomy 111 Wednesday August 30, 2017 Reminders Online homework #1 due Monday at 3pm Labs start next week Motions of the Earth ASTR111 Lecture 2 Observation:

More information

Globes, Maps, and Atlases. Plus, A Whole Bunch of Other Way Cool Geographic Information!!!

Globes, Maps, and Atlases. Plus, A Whole Bunch of Other Way Cool Geographic Information!!! Globes, Maps, and Atlases Plus, A Whole Bunch of Other Way Cool Geographic Information!!! Globes Are the Most Accurate Portrayal of the Earth The earth is about 24,900 miles in circumference, and about

More information

Celestial Sphere. Altitude [of a celestial object] Zenith. Meridian. Celestial Equator

Celestial Sphere. Altitude [of a celestial object] Zenith. Meridian. Celestial Equator Earth Science Regents Interactive Path of the Sun University of Nebraska Resources Copyright 2011 by Z. Miller Name Period COMPANION WEBSITES: http://www.analemma.com/ http://www.stellarium.org/ INTRODUCTION:

More information

Maya Achievements WRITING

Maya Achievements WRITING Maya Achievements WRITING The Maya used the most advanced system of writing of the ancient Americans. They probably borrowed the idea of picture writing from another ancient American group known as the

More information

UN Austria Symposium : Access to Space: Holistic Capacity- Building for the 21 st Century. Graz Austria, 6 septiembre 2017

UN Austria Symposium : Access to Space: Holistic Capacity- Building for the 21 st Century. Graz Austria, 6 septiembre 2017 The privileged astronomical position of Ecuador known from the time of the Aboriginal culture Quitu-Cara, and how this can stimulate the young people to study astronomy. UN Austria Symposium : Access to

More information

PHYSICS 107. Lecture 1: The Puzzle of Motion. In American universities there are three main types of physics courses for nonspecialists.

PHYSICS 107. Lecture 1: The Puzzle of Motion. In American universities there are three main types of physics courses for nonspecialists. PHYSICS 107 Lecture 1: The Puzzle of Motion About this course In American universities there are three main types of physics courses for nonspecialists. The first kind teaches about the physics of everyday

More information

C) the seasonal changes in constellations viewed in the night sky D) The duration of insolation will increase and the temperature will increase.

C) the seasonal changes in constellations viewed in the night sky D) The duration of insolation will increase and the temperature will increase. 1. Which event is a direct result of Earth's revolution? A) the apparent deflection of winds B) the changing of the Moon phases C) the seasonal changes in constellations viewed in the night sky D) the

More information

Astronomy 115 Section 4 Week 2. Adam Fries SF State

Astronomy 115 Section 4 Week 2. Adam Fries SF State Astronomy 115 Section 4 Week 2 Adam Fries SF State afries@sfsu.edu Important Notes: Homework #1 is Due at the beginning of class next time. Attendance Sheet is going around one last time! Homework Questions?

More information

Patterns of Change on Earth

Patterns of Change on Earth TEKS collect and analyze data to identify sequences and predict patterns of change in shadows, tides, seasons, and the observable appearance of the Moon over time Patterns of Change on Earth Patterns and

More information

The Perennial Ecliptic Calendar

The Perennial Ecliptic Calendar The Perennial Ecliptic Calendar INTRODUCTION The Perennial Ecliptic Calendar is a system for marking time in which weeks vary between seven and eight days in length, but everything else is completely regular:

More information

Astronomy 101 Lab: Seasons

Astronomy 101 Lab: Seasons Name: Astronomy 101 Lab: Seasons Pre-Lab Assignment: In class, we've talked about the cause of the seasons. In this lab, you will use globes to study the relative positions of Earth and the Sun during

More information

The Ecliptic on the Celestial. Sphere. The Celestial Sphere. Astronomy 210. Section 1 MWF Astronomy Building. celestial equator are not

The Ecliptic on the Celestial. Sphere. The Celestial Sphere. Astronomy 210. Section 1 MWF Astronomy Building. celestial equator are not Astronomy 210 Section 1 MWF 1500-1550 134 Astronomy Building This Class (Lecture 3): Lunar Phases Check Planetarium Schedule Next Class: HW1 Due Friday! Early Cosmology Music: We only Come out at Night

More information

The Celestial Cycle of the Anasazi by Vincent H. Malmström Emeritus Professor of Geography, Dartmouth College and Mark R. Pullen

The Celestial Cycle of the Anasazi by Vincent H. Malmström Emeritus Professor of Geography, Dartmouth College and Mark R. Pullen The Celestial Cycle of the Anasazi by Vincent H. Malmström Emeritus Professor of Geography, Dartmouth College and Mark R. Pullen Background of the Study: Early in January 2012, I received an email from

More information

Moon Project Handout. I: A Mental Model of the Sun, Moon, and Earth (Do in class.)

Moon Project Handout. I: A Mental Model of the Sun, Moon, and Earth (Do in class.) Moon Project Handout Summary: You will recreate and interpret the geometric and timing measurements performed by the Ancient Greeks in order to determine the sizes of the Sun, Moon, and Earth and the distances

More information

Module 2: Mapping Topic 2 Content: Determining Latitude and Longitude Notes

Module 2: Mapping Topic 2 Content: Determining Latitude and Longitude Notes Introduction In order to more easily locate points on a globe or map, cartographers designed a system of imaginary vertical lines (also called parallels) and horizontal lines (also called meridians) that

More information

Hurray! Time for PRS!! Steps to PRS bliss: Step 1: enter your student ID into the PRS clicker: Announcements

Hurray! Time for PRS!! Steps to PRS bliss: Step 1: enter your student ID into the PRS clicker: Announcements Hurray! Time for PRS!! Steps to PRS bliss: Step 1: enter your student ID into the PRS clicker: Turn the clicker on (0/1 switch at left). When it says, Scanning classes, hit * twice to get to the Setup

More information

Celestial Sphere & Solar Motion Lab (Norton s Star Atlas pages 1-4)

Celestial Sphere & Solar Motion Lab (Norton s Star Atlas pages 1-4) Name: Date: Celestial Sphere & Solar Motion Lab (Norton s Star Atlas pages 1-4) Italicized topics below will be covered only at the instructor s discretion. 1.0 Purpose: To understand a) the celestial

More information

Astronomical Distances. Astronomical Distances 1/30

Astronomical Distances. Astronomical Distances 1/30 Astronomical Distances Astronomical Distances 1/30 Last Time We ve been discussing methods to measure lengths and objects such as mountains, trees, and rivers. Today we ll look at some more difficult problems.

More information

proof Epilogue E Groups and Their Significance to the Ancient Maya Diane Z. Chase, Patricia A. McAnany, and Jeremy A. Sabloff

proof Epilogue E Groups and Their Significance to the Ancient Maya Diane Z. Chase, Patricia A. McAnany, and Jeremy A. Sabloff 17 Epilogue E Groups and Their Significance to the Ancient Maya Diane Z. Chase, Patricia A. McAnany, and Jeremy A. Sabloff E Groups are emerging as the earliest replicated public architecture in the Maya

More information

Astronomy is the oldest science! Eclipses. In ancient times the sky was not well understood! Bad Omens? Comets

Astronomy is the oldest science! Eclipses. In ancient times the sky was not well understood! Bad Omens? Comets Astronomy is the oldest science! In ancient times the sky was not well understood! Eclipses Bad Omens? Comets 1 The Ancient Greeks The Scientific Method Our ideas must always be consistent with our observations!

More information

ANNOUNCEMENTS. HOMEWORKS #4 & #5 handed out today. HAND HW#4 IN FOR CREDIT NEXT THURSDAY

ANNOUNCEMENTS. HOMEWORKS #4 & #5 handed out today. HAND HW#4 IN FOR CREDIT NEXT THURSDAY ANNOUNCEMENTS HOMEWORKS #4 & #5 handed out today. HAND HW#4 IN FOR CREDIT NEXT THURSDAY OPTIONAL Dark Sky Field Trip next Tuesday 6:15pm meet at Fiske dress very warmly. Pray for clear weather. IF YOU

More information

Alien Skies. Todd Timberlake

Alien Skies. Todd Timberlake Alien Skies Todd Timberlake Have you ever wanted to send your students to another planet? What would they see while looking up at the skies from their new home? Would they be able to interpret what they

More information

Astronomy 1010 Planetary Astronomy Sample Questions for Exam 1

Astronomy 1010 Planetary Astronomy Sample Questions for Exam 1 Astronomy 1010 Planetary Astronomy Sample Questions for Exam 1 Chapter 1 1. A scientific hypothesis is a) a wild, baseless guess about how something works. b) a collection of ideas that seems to explain

More information

Earth, Sun, and Stars

Earth, Sun, and Stars Earth, Sun, and Stars Daily Patterns Earth Spins Earth is always moving, even though you don t feel it. One way Earth moves is by spinning around an imaginary line. One end of the line would come out of

More information

Calculations of the Tropical Year and Precessional Cycles: Two bone fragments from Tikal Burial 116. Michael Grofe

Calculations of the Tropical Year and Precessional Cycles: Two bone fragments from Tikal Burial 116. Michael Grofe Calculations of the Tropical Year and Precessional Cycles: Two bone fragments from Tikal Burial 116 Michael Grofe NAS 191 Macri June 5, 2003 Introduction The purpose of this paper is to explore and discuss

More information

Archeoastronomy of the Egyptian and Mayan Cultures

Archeoastronomy of the Egyptian and Mayan Cultures Archeoastronomy of the Egyptian and Mayan Cultures Jordan Seres, Scarlet Benoit, JJ perez, Lorrie Vazquez Survey of the Universe (EMPACTS) Kelly howe, Instructor Northwest Arkansas Community College, Bentonville,

More information

EQUINOX OBSERVATIONS IN INDIAN CREEK, UTAH, DURING

EQUINOX OBSERVATIONS IN INDIAN CREEK, UTAH, DURING Jesse E. Warner EQUINOX OBSERVATIONS IN INDIAN CREEK, UTAH, DURING 1981-1982 The observations for the equinox sites presented here were made during March 1981, September 1981 and March 1982. Not all panels

More information

2. Modern: A constellation is a region in the sky. Every object in the sky, whether we can see it or not, is part of a constellation.

2. Modern: A constellation is a region in the sky. Every object in the sky, whether we can see it or not, is part of a constellation. 6/14 10. Star Cluster size about 10 14 to 10 17 m importance: where stars are born composed of stars. 11. Galaxy size about 10 21 m importance: provide a stable environment for stars. Composed of stars.

More information

The vicissitude of the Day and Night and their regular alternation

The vicissitude of the Day and Night and their regular alternation The vicissitude of the Day and Night and their regular alternation Written by: Dr. Karem Al-Sayed Ghanem- A Professor in the Faculty of Science, Al- Azhar University. The two words "Day and Night" have

More information

Today s Objectives: S.W.B.A.T.

Today s Objectives: S.W.B.A.T. Today s Objectives: S.W.B.A.T. Review scale of universe powers of 10 significant digits Identify and discuss the 4 earliest civilizations and their contribution to astronomy past. Name two famous ancient

More information

The I Ching Landscape.

The I Ching Landscape. The I Ching Landscape. By D.H. Van den Berghe This article builds on my earlier work on the tradional order of the I Ching. "The explanation of King Wen's order of the 64 hexagrams": (http://www.fourpillars.net/pdf/kingwen.pdf)

More information

Chapter 3 The Science of Astronomy

Chapter 3 The Science of Astronomy Chapter 3 The Science of Astronomy 3.1 The Ancient Roots of Science Our goals for learning: In what ways do all humans employ scientific thinking? How did astronomical observations benefit ancient societies?

More information

Define umbra and penumbra. Then label the umbra and the penumbra on the diagram below. Umbra: Penumbra: Light source

Define umbra and penumbra. Then label the umbra and the penumbra on the diagram below. Umbra: Penumbra: Light source Lesson 3 Eclipses and Tides LA.8.2.2.3, SC.8.E.5.9, SC.8.N.1.1 Skim or scan the heading, boldfaced words, and pictures in the lesson. Identify or predict three facts you will learn from the lesson. Discuss

More information

Seasons. What causes the seasons?

Seasons. What causes the seasons? Questions: Seasons What causes the seasons? How do we mark the progression of the seasons? What is the seasonal motion of the sun in the sky? What could cause the seasonal motion of the sun to change over

More information

Nefertari s Tomb. Alizah Salario

Nefertari s Tomb. Alizah Salario Nefertari s Tomb Nefertari s Tomb Alizah Salario Think about a story involving tomb raiders, a journey into the underworld, and a romance between a glamorous queen and a powerful king. This may sound like

More information

ASTR 101L: Motion of the Sun Take Home Lab

ASTR 101L: Motion of the Sun Take Home Lab Name: CWID: Section: Introduction Objectives This lab is designed to help you understand the Sun s apparent motion in the sky over the course of the year. In Section 2 you are asked to answer some questions

More information

Summary Sheet #1 for Astronomy Main Lesson

Summary Sheet #1 for Astronomy Main Lesson Summary Sheet #1 for Astronomy Main Lesson From our perspective on earth The earth appears flat. We can see half the celestial sphere at any time. The earth s axis is always perpendicular to the equator.

More information

Numbers and Counting. Number. Numbers and Agriculture. The fundamental abstraction.

Numbers and Counting. Number. Numbers and Agriculture. The fundamental abstraction. Numbers and Counting Number The fundamental abstraction. There is archaeological evidence of counters and counting systems in some of the earliest of human cultures. In early civilizations, counting and

More information

Monday, January 11, 2010

Monday, January 11, 2010 http://criticalexplorationjournal.blogspot.com/2010/01/letter-to-galileo.html Letter to Galileo Dear Sr. Galileo, I am most intrigued by your publication of Sidereus Nuncius and the exciting discoveries

More information

Upon Whose Shoulders We Stand: A History of Astronomy Up to 200 A.D. Dick Mallot 3/17/2005

Upon Whose Shoulders We Stand: A History of Astronomy Up to 200 A.D. Dick Mallot 3/17/2005 Upon Whose Shoulders We Stand: A History of Astronomy Up to 200 A.D. Dick Mallot 3/17/2005 Who were these ancient astronomers? Where did real astronomy begin? What did we know about astronomy 2000+ years

More information

Announcements. Homework 1 posted on Compass

Announcements. Homework 1 posted on Compass Announcements Homework 1 posted on Compass Ordinarily due by classtime next Friday Jan 27, but HW1 available on Compass until Jan 30 can submit answers for score more than once: persistence pays off! Register

More information

Preptests 55 Answers and Explanations (By Ivy Global) Section 4 Logic Games

Preptests 55 Answers and Explanations (By Ivy Global) Section 4 Logic Games Section 4 Logic Games Questions 1 6 There aren t too many deductions we can make in this game, and it s best to just note how the rules interact and save your time for answering the questions. 1. Type

More information

How the Greeks Used Geometry to Understand the Stars

How the Greeks Used Geometry to Understand the Stars previous index next How the Greeks Used Geometry to Understand the Stars Michael Fowler, University of Virginia 9/16/2008 Crystal Spheres: Plato, Eudoxus, Aristotle Plato, with his belief that the world

More information

Summer solstice June 21, 2014

Summer solstice June 21, 2014 function get_style19370 () { return "none"; } function end19370_ () { document.getelementbyid('elastomer19370').style.display = get_style19370(); } Differences in amount of daylight on solstices for Liberal

More information

Introduction To Modern Astronomy I: Solar System

Introduction To Modern Astronomy I: Solar System ASTR 111 003 Fall 2007 Lecture 02 Sep. 10, 2007 Introduction To Modern Astronomy I: Solar System Introducing Astronomy (chap. 1-6) Planets and Moons (chap. 7-15) Chap. 16: Our Sun Chap. 28: Search for

More information

Eratosthenes method of measuring the Earth

Eratosthenes method of measuring the Earth Eratosthenes method of measuring the Earth Credit for the first determination of the size of the Earth goes to the Greek polymath Eratosthenes, who lived from around 276 BC to 195 BC. Born in the Greek

More information

Geography of the Americas

Geography of the Americas STATION ACTIVITY Geography of the Americas NAME: Directions: Using each station s text and maps, complete this graphic organizer. Olmec Mayans Aztecs Incas Where was this people group located? (include

More information

The. Astronomy is full of cycles. Like the day, the month, & the year In this section we will try to understand these cycles.

The. Astronomy is full of cycles. Like the day, the month, & the year In this section we will try to understand these cycles. Understanding The Sky Astronomy is full of cycles Like the day, the month, & the year In this section we will try to understand these cycles. For Example Why do we think of stars as nighttime objects?

More information

Phys Lab #1: The Sun and the Constellations

Phys Lab #1: The Sun and the Constellations Phys 10293 Lab #1: The Sun and the Constellations Introduction Astronomers use a coordinate system that is fixed to Earth s latitude and longitude. This way, the coordinates of a star or planet are the

More information

Physics Lab #4:! Starry Night Student Exercises I!

Physics Lab #4:! Starry Night Student Exercises I! Physics 10293 Lab #4: Starry Night Student Exercises I Introduction For today s lab, we are going to let the Starry Night software do much of the work for us. We re going to walk through some of the sample

More information

Comments on Markosian s How Fast Does Time Pass?

Comments on Markosian s How Fast Does Time Pass? Comments on Markosian s How Fast Does Time Pass? In 2 of his paper Markosian tries to spell out what he means to say when he says that time passes. Most of his discussion has to do with temporal language

More information

P. A. Allee, J. Fountain, and R. Seely

P. A. Allee, J. Fountain, and R. Seely The Black Dragon Solar Solstice Markers and Calendar P. A. Allee, J. Fountain, and R. Seely Abstract The Black Dragon pictograph site near Green River, Utah, has two styles of paintings: a Barrier Canyon

More information

Lesson 20: The Earth in its Orbit

Lesson 20: The Earth in its Orbit 291 Lesson 20: The Earth in its Orbit Recall that the Earth s orbit around the un is an ellipse which is almost a perfect circle. The average distance from the un to the Earth is 152,100,000 km (to the

More information

Seasonal Path of the Sun and Latitude

Seasonal Path of the Sun and Latitude Seasonal Path of the Sun and Latitude Overview This lesson is a modification of what Dave Hess and I, Stan Skotnicki, use in our Earth Science classes at Cheektowaga Central High School. It is an extension

More information

The Celestial Sphere. Chapter 1. Constellations. Models and Science. Constellations. Diurnal vs. Annular Motion 9/16/2010

The Celestial Sphere. Chapter 1. Constellations. Models and Science. Constellations. Diurnal vs. Annular Motion 9/16/2010 The Celestial Sphere Chapter 1 Cycles of the Sky Vast distances to stars prevent us from sensing their true 3-D arrangement Naked eye observations treat all stars at the same distance, on a giant celestial

More information

It s Full of Stars! Outline. A Sky Full of Stars. Astronomy 210. lights), about how many stars can we see with

It s Full of Stars! Outline. A Sky Full of Stars. Astronomy 210. lights), about how many stars can we see with Astronomy 210 Section 1 MWF 1500-1550 134 Astronomy Building Leslie Looney Phone: 244-3615 Email: lwlw@wuiucw. wedu Office: Astro Building #218 Office Hours: MTF 10:30-11:30 a.m. or by appointment This

More information

Guidepost. Chapter 2 A User s Guide to the Sky. Constellations Constellations (2) 8/27/2015. Outline. Outline (continued)

Guidepost. Chapter 2 A User s Guide to the Sky. Constellations Constellations (2) 8/27/2015. Outline. Outline (continued) Chapter 2 A User s Guide to the Sky Guidepost Astronomy is about us. As we learn about astronomy, we learn about ourselves. We search for an answer to the question What are we? The quick answer is that

More information

ClassAction: Coordinates and Motions Module Instructor s Manual

ClassAction: Coordinates and Motions Module Instructor s Manual ClassAction: Coordinates and Motions Module Instructor s Manual Table of Contents Section 1: Warm-up Questions...3 The Sun s Path 1 4 Section 2: General Questions...5 Sledding or Going to the Beach...6

More information

5 - Seasons. Figure 1 shows two pictures of the Sun taken six months apart with the same camera, at the same time of the day, from the same location.

5 - Seasons. Figure 1 shows two pictures of the Sun taken six months apart with the same camera, at the same time of the day, from the same location. Name: Partner(s): 5 - Seasons ASTR110L Purpose: To measure the distance of the Earth from the Sun over one year and to use the celestial sphere to understand the cause of the seasons. Answer all questions

More information

Special Theory of Relativity Prof. Shiva Prasad Department of Physics Indian Institute of Technology, Bombay. Lecture - 15 Momentum Energy Four Vector

Special Theory of Relativity Prof. Shiva Prasad Department of Physics Indian Institute of Technology, Bombay. Lecture - 15 Momentum Energy Four Vector Special Theory of Relativity Prof. Shiva Prasad Department of Physics Indian Institute of Technology, Bombay Lecture - 15 Momentum Energy Four Vector We had started discussing the concept of four vectors.

More information

(1) How does the annual average sun angle at solar noon (that is, the sun angle at noon averaged over a full year) depend on latitude?

(1) How does the annual average sun angle at solar noon (that is, the sun angle at noon averaged over a full year) depend on latitude? (1) How does the annual average sun angle at solar noon (that is, the sun angle at noon averaged over a full year) depend on latitude? (A) * As latitude increases, average sun angle at solar noon decreases.

More information

Spatial Non-Cellular Automata

Spatial Non-Cellular Automata ECOSYSTEM MODELS Spatial Non-Cellular Automata Tony Starfield Recorded: March, 2011 In the previous segment, we looked at cellular automata models, but we ended with the idea that not all spatial models

More information