January 19, notes.notebook. Claudius Ptolemaeus Second Century AD. Jan 5 7:37 AM
|
|
- Agatha Charlene McDaniel
- 5 years ago
- Views:
Transcription
1 8.1 notes.notebook Claudius Ptolemaeus Second Century AD Jan 5 7:7 AM Copernicus: The Foundation Nicholas Copernicus (Polish, ): Proposed the first modern heliocentric model, motivated by inaccuracies of the Ptolemaic model and based on aesthetic principles only indirectly on evidence. Features of the model: It was still based on circles and epicycles, and was not more accurate than the Ptolemaic model However, it allowed the calculation of distances to planets in AU, and provided the correct explanation for retrograde motion. What happened: Copernicus' model was not widely read or accepted right away, because it is difficult to change established ideas (although it did spark debates, and eventually condemnation by the Catholic church), because of its limitations, and because it did not address some of the better arguments in favor of geocentric models. Jan 5 7:0 AM 1
2 Tycho Brahe: The Data Tycho Brahe (Danish, ): The greatest pretelescope astronomer; Became famous after observing a (super)nova in 1572 and a comet in 1577, and proving that they were farther than the Moon: Heavens can change! Was given an island on which to build his observatory. His Solar System model: Believed in a mixed model, with the Sun and Moon orbiting the Earth (no stellar parallax!); Few people ever believed in it. The observations: He made the best and most systematic naked eye observations up to that time, accurate to 1', kept extensive detailed records of them,... and hired Johannes Kepler as his assistant. Jan 5 7:0 AM Kepler: From Observation to Model of the Solar System Johannes Kepler (German, ): Started trying to explain Tycho's data on Mars; Ended up developing the empirical model we still accept today for the solar system (basically). Laws of planetary motion: Three simple laws, 1. Ellipses: All planets move along ellipses, with the Sun at one focus; 2. Areas: Planets sweep out equal areas around the Sun in equal times (they move faster when closer to the Sun);. Periods: The period 2 is proportional to the distance. [Verification: Helped by 161 observations of a Mercury transit, and 1655 observations by Giandomenico Cassini of the Sun.] Are there other laws? Is there a pattern in the spacings or periods among the planets? Not the way Kepler hoped for, but there are resonances. How good are these laws? We now know that they need small corrections, but they hold for any planetary system, any moon around a planet. Jan 5 7:06 AM 2
3 Galileo: Observations and Response to Aristotle Galileo Galilei (Italian, ): Introduced the concept of inertia, with which he could address Aristotle's objection to a moving Earth. Observations: The first to use telescopes in astronomy (1609) and publish his results; Saw stars in Milky Way (so stars can be so distant that they don't show parallax), features on Moon and Sun (so not all heavenly bodies are perfect), four "little stars" around Jupiter (so another body and a moving one at that can have orbiting moons), phases of Venus (a complete set); Why is this important? Ideas: He supported the Copernican Model, but was forced to recant. Thought that planets are "worlds," not just dots of light. Other observations: He also saw that Saturn sometimes has things sticking out from its sides (like ears), and looked for stellar parallax in Mizar Jan 5 7:09 AM Tycho Brahe Jan 5 6:46 AM
4 8.1 notes.notebook Jan 5 6:59 AM Jan 2 7:06 AM 4
5 Jan 5 6:48 AM Jan 2 7:07 AM 5
6 91.5 million miles 94.5 million miles Jan 5 6:49 AM Kepler's rd Law...the ratio of the orbital radius cubed to the period squared of all inferior objects to a common superior object is constant. r o T 2 = K What do the planets circle? the Sun, the Sun is Superior and the planets Inferior Because the rd Law is a ratio you do not have to use standard units! Jan 5 9:42 AM 6
7 Sun r om = orbital radius of Mercury Jan 2 1:22 PM 1) Mercury, Venus, and the Earth all circle the Sun 2), they all that the same ratio of r /T 2 ) Compare Mercury and Venus to the Earth Venus: r ov = 1.08 x m r oe = r ov T e 2 T v 2 Mercury: r om = 5.79 x m r oe = r om 2 T e 2 T m (1.50 x m) = (1.08 x m) (1 yr) 2 (T v ) 2 (1.50 x m) = ( x 10 m) (1 yr) 2 (T m ) 2 T v = yr or, 22 days T m =?.24 yrs Jan 2 1:22 PM 7
8 r oe = r op 2 T e Tp 2 What is the period of Pluto? r oe = 1.5 x m r op = 5.91 x m Pluto is 9.4 x further from the Sun than the Earth is... or, 9.4 x r oe, or 9.4 r oe T e is one year 1r oe = 9.4 r oe 1 yr 2 2 T p T p = (9.4 r oe) x 1 yr 2 1r oe T p = 247 yrs Jan 11 11:0 AM Where do you put a satellite if you want it to circle the earth once a day? r os =? question: What does the satellite circle? answer: the earth! question: What else circles the earth? answer: the moon ro the of the moon and satellite T 2 = K and moon have to be the same! moon: rom =.9 x 10 8 m Tm = 27. days Superior inferior r om = r os 2 2 T m T s ros from surface (.9 x 10 8 ) = r os (27. da) 2 (1 da) 2 r os = 4. x 10 7 m How far above the earth's surface is that? Jan 11 11:02 AM 8
9 Jan 8 10:27 AM m/s 2 Jan 8 10:29 AM 9
10 Jan 8 10:0 AM Jan 8 10:1 AM 10
11 Jan 2 11:0 AM Law of Universal Gravitation Every object in the universe attracts every other object in the universe with a force that directly proportionate to the product of the masses and inversely proportionate to with the square of the distance between Jan 5 6:41 AM 11
12 Jan 2 7:11 AM Jan 2 1:49 PM 12
13 8.1 notes.notebook Jan 2 10:0 AM Jan 5 6:46 AM 1
14 Gravity pulls the milkman to the earth. We call this pull (force) the milkman's weight. So, the force of gravity on an object is its weight. Or, F = Gm 1 m 2 /r 2 and F w = mg F = F w the "m" is the mass of the or, inferior object "m 2 " Gm 1 m 2 /r 2 = m 2 g g = Gm 1 /r 2 F w = m 2 g Jan 5 6:51 AM g = Gm 1 /r 2 You can find acceleration (g) due to gravity on any object if know its mass and radius. or, If you can measure "g" and know the radius you can find its mass! Example: You're on the moon and with your trusty 1.00 m pendulum you measure its period to be 4.97 s. What is the mass of the moon? a = 4π 2 r/t 2 a = 4π 2 (1.00 m)/(4.97 s) 2 a = 1.60 m/s 2 g = Gm 1 /r 2 m 1 = gr 2 /G m 1 = 1.60 m/s 2 /(1.785 x 10 6 m) 2 /6.67 x Nm 2 /kg 2 m 1 = 7.64 x kg Jan 7 7:12 AM 14
15 Gravity is the force that causes the moon to circle the earth. That means that gravity is acting as a centripetal force. F = Gm 1 m 2 /r 2 F c = mv 2 /r F = Gm 1 m 2 /r 2 F c = m 2 v 2 /r F = F c Gm 1 m 2 /r 2 = m 2 v 2 /r v = Gm 1 /r the "m" is the mass of the or, inferior object "m 2 " F c = m 2 v 2 /r note that the velocity an object orbits at in determined only by the mass and distance from the superior object. Orbiting velocity has nothing to do with the inferior objects mass! Jan 7 7:2 AM v = Gm 1 /r Example: What velocity does the moon orbit the earth with? r om =.9 x 10 8 m m 1 = 5.98 x kg (earth is the superior object) v = Gm 1 /r v = 6.67 x Nm 2 /kg 2 (5.98 x kg)/.9 x 10 8 kg v = 1010 m/s Jan 8 7:5 AM 15
16 Gravity is the force that causes the moon to circle the earth. That means that gravity is acting as a centripetal force. F = F Gm = Gm 1 m 2 /r 2 F c = mv 2 1 m 2 /r 2 F c = m4π 2 r/t /r 2 the "m" is the mass of the or, inferior object "m 2 " F = Gm 1 m 2 /r 2 and F c = m 2 4π 2 r/t 2 F = F c F c = m 2 4π 2 r/t 2 Gm 1 m 2 /r 2 = m 2 4π 2 r/t 2 multiply by "r 2 " and divide by m 2 divide both sides by "4π 2 " r /T 2 = Gm 1 /4π 2 Jan 7 7:8 AM r /T 2 = Gm 1 /4π 2 Example: What is the period of the moon? r om =.9 x 10 8 m m 1 = 5.98 x kg (the earth is superior) r /T 2 = Gm 1 /4π 2 T m = 4π 2 r om /Gm e T m = [4π 2 (.9 x 10 8 m) ]/[(6.67 x nm 2 /kg 2 ) 5.98 x kg] T m = 2.42 x 10 6 sec. = 28 days Jan 8 8:26 AM 16
17 Attachments Universal Gravitation.pptx
Claudius Ptolemaeus Second Century AD. Jan 5 7:37 AM
Claudius Ptolemaeus Second Century AD Jan 5 7:37 AM Copernicus: The Foundation Nicholas Copernicus (Polish, 1473 1543): Proposed the first modern heliocentric model, motivated by inaccuracies of the Ptolemaic
More informationSir Isaac and Universal Gravitation... so what really happened?
Sir Isaac and Universal Gravitation... so what really happened? okay, probably no! There's always been man made beliefs about what is! For the Aztecs, who lived in central Mexico, Tonatiuh was a Sun god.
More informationLecture #5: Plan. The Beginnings of Modern Astronomy Kepler s Laws Galileo
Lecture #5: Plan The Beginnings of Modern Astronomy Kepler s Laws Galileo Geocentric ( Ptolemaic ) Model Retrograde Motion: Apparent backward (= East-to-West) motion of a planet with respect to stars Ptolemy
More informationPlanetary Orbits: Kepler s Laws 1/18/07
Planetary Orbits: Kepler s Laws Announcements The correct link for the course webpage http://www.lpl.arizona.edu/undergrad/classes/spring2007/giacalone_206-2 The first homework due Jan 25 (available for
More informationIn so many and such important. ways, then, do the planets bear witness to the earth's mobility. Nicholas Copernicus
In so many and such important ways, then, do the planets bear witness to the earth's mobility Nicholas Copernicus What We Will Learn Today What did it take to revise an age old belief? What is the Copernican
More informationAstronomy Notes Chapter 02.notebook April 11, 2014 Pythagoras Aristotle geocentric retrograde motion epicycles deferents Aristarchus, heliocentric
Around 2500 years ago, Pythagoras began to use math to describe the world around him. Around 200 years later, Aristotle stated that the Universe is understandable and is governed by regular laws. Most
More informationToday. Planetary Motion. Tycho Brahe s Observations. Kepler s Laws Laws of Motion. Laws of Motion
Today Planetary Motion Tycho Brahe s Observations Kepler s Laws Laws of Motion Laws of Motion In 1633 the Catholic Church ordered Galileo to recant his claim that Earth orbits the Sun. His book on the
More informationGravity. Newton s Law of Gravitation Kepler s Laws of Planetary Motion Gravitational Fields
Gravity Newton s Law of Gravitation Kepler s Laws of Planetary Motion Gravitational Fields Simulation Synchronous Rotation https://www.youtube.com/watch?v=ozib_l eg75q Sun-Earth-Moon System https://vimeo.com/16015937
More information9/12/2010. The Four Fundamental Forces of Nature. 1. Gravity 2. Electromagnetism 3. The Strong Nuclear Force 4. The Weak Nuclear Force
The Four Fundamental Forces of Nature 1. Gravity 2. Electromagnetism 3. The Strong Nuclear Force 4. The Weak Nuclear Force The Universe is made of matter Gravity the force of attraction between matter
More informationPHYS 155 Introductory Astronomy
PHYS 155 Introductory Astronomy - observing sessions: Sunday Thursday, 9pm, weather permitting http://www.phys.uconn.edu/observatory - Exam - Tuesday March 20, - Review Monday 6:30-9pm, PB 38 Marek Krasnansky
More informationLearning Objectives. one night? Over the course of several nights? How do true motion and retrograde motion differ?
Kepler s Laws Learning Objectives! Do the planets move east or west over the course of one night? Over the course of several nights? How do true motion and retrograde motion differ?! What are geocentric
More informationIntroduction To Modern Astronomy I
ASTR 111 003 Fall 2006 Lecture 03 Sep. 18, 2006 Introduction To Modern Astronomy I Introducing Astronomy (chap. 1-6) Planets and Moons (chap. 7-17) Ch1: Astronomy and the Universe Ch2: Knowing the Heavens
More informationHistory of Astronomy. PHYS 1411 Introduction to Astronomy. Tycho Brahe and Exploding Stars. Tycho Brahe ( ) Chapter 4. Renaissance Period
PHYS 1411 Introduction to Astronomy History of Astronomy Chapter 4 Renaissance Period Copernicus new (and correct) explanation for retrograde motion of the planets Copernicus new (and correct) explanation
More informationEarly Models of the Universe. How we explained those big shiny lights in the sky
Early Models of the Universe How we explained those big shiny lights in the sky The Greek philosopher Aristotle (384 322 BCE) believed that the Earth was the center of our universe, and everything rotated
More informationKepler, Newton, and laws of motion
Kepler, Newton, and laws of motion First: A Little History Geocentric vs. heliocentric model for solar system (sec. 2.2-2.4)! The only history in this course is this progression: Aristotle (~350 BC) Ptolemy
More informationPhysics Unit 7: Circular Motion, Universal Gravitation, and Satellite Orbits. Planetary Motion
Physics Unit 7: Circular Motion, Universal Gravitation, and Satellite Orbits Planetary Motion Geocentric Models --Many people prior to the 1500 s viewed the! Earth and the solar system using a! geocentric
More informationChapter 4. The Origin Of Modern Astronomy. Is okay to change your phone? From ios to Android From Android to ios
Chapter 4 The Origin Of Modern Astronomy Slide 14 Slide 15 14 15 Is Change Good or Bad? Do you like Homer to look like Homer or with hair? Does it bother you when your schedule is changed? Is it okay to
More information2.4 The Birth of Modern Astronomy
2.4 The Birth of Modern Astronomy Telescope invented around 1600 Galileo built his own, made observations: Moon has mountains and valleys Sun has sunspots, and rotates Jupiter has moons (shown): Venus
More informationAnnouncements. Topics To Be Covered in this Lecture
Announcements! Tonight s observing session is cancelled (due to clouds)! the next one will be one week from now, weather permitting! The 2 nd LearningCurve activity was due earlier today! Assignment 2
More informationToday. Planetary Motion. Tycho Brahe s Observations. Kepler s Laws of Planetary Motion. Laws of Motion. in physics
Planetary Motion Today Tycho Brahe s Observations Kepler s Laws of Planetary Motion Laws of Motion in physics Page from 1640 text in the KSL rare book collection That the Earth may be a Planet the seeming
More informationAncient Cosmology: A Flat Earth. Alexandria
Today Competing Cosmologies Geocentric vs. Heliocentric Ptolemy vs. copernicus Retrograde Motion Phases of Venus Galileo FIRST HOMEWORK DUE How d it work? Ancient Cosmology: A Flat Earth Here there be
More informationPlanetary Mechanics:
Planetary Mechanics: Satellites A satellite is an object or a body that revolves around another body due to the gravitational attraction to the greater mass. Ex: The planets are natural satellites of the
More informationGravitation and the Motion of the Planets
Gravitation and the Motion of the Planets 1 Guiding Questions 1. How did ancient astronomers explain the motions of the planets? 2. Why did Copernicus think that the Earth and the other planets go around
More informationDays of the week: - named after 7 Power (moving) objects in the sky (Sun, Moon, 5 planets) Models of the Universe:
Motions of the Planets ( Wanderers ) Planets move on celestial sphere - change RA, Dec each night - five are visible to naked eye Mercury, Venus, Mars, Jupiter, Saturn Days of the week: - named after 7
More informationASTR 1010 Spring 2016 Study Notes Dr. Magnani
The Copernican Revolution ASTR 1010 Spring 2016 Study Notes Dr. Magnani The Copernican Revolution is basically how the West intellectually transitioned from the Ptolemaic geocentric model of the Universe
More informationObservational Astronomy - Lecture 4 Orbits, Motions, Kepler s and Newton s Laws
Observational Astronomy - Lecture 4 Orbits, Motions, Kepler s and Newton s Laws Craig Lage New York University - Department of Physics craig.lage@nyu.edu February 24, 2014 1 / 21 Tycho Brahe s Equatorial
More informationGravitation and the Waltz of the Planets
Gravitation and the Waltz of the Planets Chapter Four Guiding Questions 1. How did ancient astronomers explain the motions of the planets? 2. Why did Copernicus think that the Earth and the other planets
More informationGravitation and the Waltz of the Planets. Chapter Four
Gravitation and the Waltz of the Planets Chapter Four Guiding Questions 1. How did ancient astronomers explain the motions of the planets? 2. Why did Copernicus think that the Earth and the other planets
More informationIntroduction To Modern Astronomy II
ASTR 111 003 Fall 2006 Lecture 03 Sep. 18, 2006 Introduction To Modern Astronomy II Introducing Astronomy (chap. 1-6) Planets and Moons (chap. 7-17) Ch1: Astronomy and the Universe Ch2: Knowing the Heavens
More informationChapter 2 The Science of Life in the Universe
In ancient times phenomena in the sky were not understood! Chapter 2 The Science of Life in the Universe The Ancient Greeks The Scientific Method Our ideas must always be consistent with our observations!
More informationEvidence that the Earth does not move: Greek Astronomy. Aristotelian Cosmology: Motions of the Planets. Ptolemy s Geocentric Model 2-1
Greek Astronomy Aristotelian Cosmology: Evidence that the Earth does not move: 1. Stars do not exhibit parallax: 2-1 At the center of the universe is the Earth: Changeable and imperfect. Above the Earth
More informationEarly Theories. Early astronomers believed that the sun, planets and stars orbited Earth (geocentric model) Developed by Aristotle
Planetary Motion Early Theories Early astronomers believed that the sun, planets and stars orbited Earth (geocentric model) Developed by Aristotle Stars appear to move around Earth Observations showed
More informationAstronomy- The Original Science
Astronomy- The Original Science Imagine that it is 5,000 years ago. Clocks and modern calendars have not been invented. How would you tell time or know what day it is? One way to tell the time is to study
More informationThe History of Astronomy. Theories, People, and Discoveries of the Past
The History of Astronomy Theories, People, and Discoveries of the Past Early man recorded very little history. Left some clues in the form of petrographs. Stone drawings that show eclipses, comets, supernovae.
More information18. Kepler as a young man became the assistant to A) Nicolaus Copernicus. B) Ptolemy. C) Tycho Brahe. D) Sir Isaac Newton.
Name: Date: 1. The word planet is derived from a Greek term meaning A) bright nighttime object. B) astrological sign. C) wanderer. D) nontwinkling star. 2. The planets that were known before the telescope
More informationCopernican Revolution. ~1500 to ~1700
~1500 to ~1700 Copernicus (~1500) Brahe (~1570) Kepler (~1600) Galileo (~1600) Newton (~1670) The Issue: Geocentric or Heliocentric Which model explains observations the best? Copernicus (~1500) Resurrected
More informationMonday, October 3, 2011
We do not ask for what useful purpose the birds do sing, for song is their pleasure since they were created for singing. Similarly, we ought not ask why the human mind troubles to fathom the secrets of
More informationModule 3: Astronomy The Universe Topic 6 Content: The Age of Astronomy Presentation Notes
Module 3: Astronomy The Universe The Age of Astronomy was marked by the struggle to understand the placement of Earth in the universe and the effort to understand planetary motion. Behind this struggle
More informationChapter 02 The Rise of Astronomy
Chapter 02 The Rise of Astronomy Multiple Choice Questions 1. The moon appears larger when it rises than when it is high in the sky because A. You are closer to it when it rises (angular-size relation).
More informationMost of the time during full and new phases, the Moon lies above or below the Sun in the sky.
6/16 Eclipses: We don t have eclipses every month because the plane of the Moon s orbit about the Earth is different from the plane the ecliptic, the Earth s orbital plane about the Sun. The planes of
More informationJohannes Kepler ( ) German Mathematician and Astronomer Passionately convinced of the rightness of the Copernican view. Set out to prove it!
Johannes Kepler (1571-1630) German Mathematician and Astronomer Passionately convinced of the rightness of the Copernican view. Set out to prove it! Kepler s Life Work Kepler sought a unifying principle
More informationModels of the Solar System. The Development of Understanding from Ancient Greece to Isaac Newton
Models of the Solar System The Development of Understanding from Ancient Greece to Isaac Newton Aristotle (384 BC 322 BC) Third in line of Greek thinkers: Socrates was the teacher of Plato, Plato was the
More informationCompeting Models. The Ptolemaic system (Geocentric) The Copernican system (Heliocentric)
Competing Models The Ptolemaic system (Geocentric) The Copernican system (Heliocentric) How did Galileo solidify the Copernican revolution? Galileo overcame major objections to the Copernican view. Three
More informationMotions of the Planets ASTR 2110 Sarazin
Motions of the Planets ASTR 2110 Sarazin Motion of Planets Retrograde Motion Inferior Planets: Mercury, Venus Always near Sun on Sky Retrograde motion when very close to Sun on sky (Every other time) Superior
More informationGravitation Part I. Ptolemy, Copernicus, Galileo, and Kepler
Gravitation Part I. Ptolemy, Copernicus, Galileo, and Kepler Celestial motions The stars: Uniform daily motion about the celestial poles (rising and setting). The Sun: Daily motion around the celestial
More informationAstronomy Lesson 8.1 Astronomy s Movers and Shakers
8 Astronomers.notebook Astronomy Lesson 8.1 Astronomy s Movers and Shakers Aristotle 384 322 BCE Heavenly objects must move on circular paths at constant speeds. Earth is motionless at the center of the
More informationOccam s Razor: William of Occam, 1340(!)
Reading: OpenStax, Chapter 2, Section 2.2 &2.4, Chapter 3, Sections 3.1-3.3 Chapter 5, Section 5.1 Last time: Scales of the Universe Astro 150 Spring 2018: Lecture 2 page 1 The size of our solar system,
More informationHow big is the Universe and where are we in it?
Announcements Results of clicker questions from Monday are on ICON. First homework is graded on ICON. Next homework due one minute before midnight on Tuesday, September 6. Labs start this week. All lab
More informationThis Week... Week 3: Chapter 3 The Science of Astronomy. 3.1 The Ancient Roots of Science. How do humans employ scientific thinking?
Week 3: Chapter 3 The Science of Astronomy This Week... The Copernican Revolution The Birth of Modern Science Chapter 2 Walkthrough Discovering the solar system Creating a clockwork Universe 3.1 The Ancient
More informationLecture 4: Kepler and Galileo. Astronomy 111 Wednesday September 6, 2017
Lecture 4: Kepler and Galileo Astronomy 111 Wednesday September 6, 2017 Reminders Online homework #2 due Monday at 3pm Johannes Kepler (1571-1630): German Was Tycho s assistant Used Tycho s data to discover
More informationAstr 2320 Tues. Jan. 24, 2017 Today s Topics Review of Celestial Mechanics (Ch. 3)
Astr 2320 Tues. Jan. 24, 2017 Today s Topics Review of Celestial Mechanics (Ch. 3) Copernicus (empirical observations) Kepler (mathematical concepts) Galileo (application to Jupiter s moons) Newton (Gravity
More informationcosmogony geocentric heliocentric How the Greeks modeled the heavens
Cosmogony A cosmogony is theory about ones place in the universe. A geocentric cosmogony is a theory that proposes Earth to be at the center of the universe. A heliocentric cosmogony is a theory that proposes
More informationHistory of Astronomy. Historical People and Theories
History of Astronomy Historical People and Theories Plato Believed he could solve everything through reasoning. Circles and Spheres are good because they are perfect (never ending) and pleasing to the
More informationPractice Test DeAnza College Astronomy 04 Test 1 Spring Quarter 2009
Practice Test DeAnza College Astronomy 04 Test 1 Spring Quarter 2009 Multiple Choice Identify the letter of the choice that best completes the statement or answers the question. Mark answer on Scantron.
More informationThings to do today. Terminal, Astronomy is Fun. Lecture 24 The Science of Astronomy. Scientific Thinking. After this lecture, please pick up:
Things to do today After this lecture, please pick up: Review questions for the final exam Homework#6 (due next Tuesday) No class on Thursday (Thanksgiving) Final exam on December 2 (next Thursday) Terminal,
More informationASTR-1010: Astronomy I Course Notes Section III
ASTR-1010: Astronomy I Course Notes Section III Dr. Donald G. Luttermoser Department of Physics and Astronomy East Tennessee State University Edition 2.0 Abstract These class notes are designed for use
More informationThe following notes roughly correspond to Section 2.4 and Chapter 3 of the text by Bennett. This note focuses on the details of the transition for a
The following notes roughly correspond to Section 2.4 and Chapter 3 of the text by Bennett. This note focuses on the details of the transition for a geocentric model for understanding the universe to a
More informationChapter 2. The Rise of Astronomy. Copyright (c) The McGraw-Hill Companies, Inc. Permission required for reproduction or display.
Chapter 2 The Rise of Astronomy Copyright (c) The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Periods of Western Astronomy Western astronomy divides into 4 periods Prehistoric
More information5. Universal Laws of Motion
5. Universal Laws of Motion If I have seen farther than others, it is because I have stood on the shoulders of giants. Sir Isaac Newton (164 177) Physicist Image courtesy of NASA/JPL Sir Isaac Newton (164-177)
More informationTest Bank for Life in the Universe, Third Edition Chapter 2: The Science of Life in the Universe
1. The possibility of extraterrestrial life was first considered A) after the invention of the telescope B) only during the past few decades C) many thousands of years ago during ancient times D) at the
More informationN = R * f p n e f l f i f c L
Astronomy 230 Section 1 MWF 1400-1450 106 B6 Eng Hall This Class (Lecture 20): Evolution of the Worldview Next Class: Lifetime Presentations MWF: Arthur Jones Mark Piergies Matt Clarkin Gergana Slavova
More informationContents: -Information/Research Packet. - Jumbled Image packet. - Comic book cover page. -Comic book pages. -Example finished comic
Contents: -Information/Research Packet - Jumbled Image packet - Comic book cover page -Comic book pages -Example finished comic Nicolaus Copernicus Nicholas Copernicus was a Polish astronomer who lived
More informationObserving the Solar System 20-1
Observing the Solar System 20-1 Ancient Observations The ancient Greeks observed the sky and noticed that the moon, sun, and stars seemed to move in a circle around the Earth. It seemed that the Earth
More informationHow High Is the Sky? Bob Rutledge
How High Is the Sky? Bob Rutledge Homer s Physics: Feb 16 2007 The Sun 8 Light Minutes Away 2 The Pleiades 300 Light Years Away (and inside our galaxy) [The nearest star, Proxima Cen, is only 4.2 light
More informationLecture 13. Gravity in the Solar System
Lecture 13 Gravity in the Solar System Guiding Questions 1. How was the heliocentric model established? What are monumental steps in the history of the heliocentric model? 2. How do Kepler s three laws
More informationD. A system of assumptions and principles applicable to a wide range of phenomena that has been repeatedly verified
ASTRONOMY 1 EXAM 1 Name Identify Terms - Matching (20 @ 1 point each = 20 pts.) 1 Solar System G 7. aphelion N 14. eccentricity M 2. Planet E 8. apparent visual magnitude R 15. empirical Q 3. Star P 9.
More informationGravity and the Orbits of Planets
Gravity and the Orbits of Planets 1. Gravity Galileo Newton Earth s Gravity Mass v. Weight Einstein and General Relativity Round and irregular shaped objects 2. Orbits and Kepler s Laws ESO Galileo, Gravity,
More informationEarth Science, 13e Tarbuck & Lutgens
Earth Science, 13e Tarbuck & Lutgens Origins of Modern Astronomy Earth Science, 13e Chapter 21 Stanley C. Hatfield Southwestern Illinois College Early history of astronomy Ancient Greeks Used philosophical
More informationDirections: Read each slide
Directions: Read each slide and decide what information is needed. Some slides may have red or yellow or orange underlined. This information is a clue for you to read more carefully or copy the information
More information,.~ Readlng ~ What,~,~~ is a geocentric system? Chapter3 J 73
Earth at the Center When the ancient Greeks watched the stars move across the sky, they noticed that the patterns of the stars didn t change. Although the stars seemed to move, they stayed in the same
More informationAstronomy A BEGINNER S GUIDE TO THE UNIVERSE EIGHTH EDITION
Astronomy A BEGINNER S GUIDE TO THE UNIVERSE EIGHTH EDITION CHAPTER 1 The Copernican Revolution Lecture Presentation 1.0 Have you ever wondered about? Where are the stars during the day? What is the near
More informationThe Puzzle of Planetary Motion versus
The Puzzle of Planetary Motion versus Finding Earth s place in the Universe Observing the Planets Five of the planets are bright enough to be seen by the unaided eye. This view shows the sky after sunset
More informationExam #1 Study Guide (Note this is not all the information you need to know for the test, these are just SOME of the main points)
Exam #1 Study Guide (Note this is not all the information you need to know for the test, these are just SOME of the main points) Moon Phases Moon is always ½ illuminated by the Sun, and the sunlit side
More informationMotion in the Heavens
Motion in the Heavens Most ancient cultures believed that the earth was the centre of the universe. Most felt that the planets, stars, moon and sun revolved around the earth. This is known as a geocentric
More informationUnderstanding Planetary Motion
Understanding Planetary Motion Use experimental observations (made prior to telescopes) to understand motion of the planets. Period is easy, distances and orbit shape are hard (except Venus and Mercury
More informationChapter 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 informationWas Ptolemy Pstupid?
Was Ptolemy Pstupid? Why such a silly title for today s lecture? Sometimes we tend to think that ancient astronomical ideas were stupid because today we know that they were wrong. But, while their models
More informationTycho Brahe
Tycho Brahe 1546-1601 At the time of Shakespeare and Elizabeth I and Champlain Lost part of his nose in a duel over who was the best mathematician At 27 he measured the distance of a supernova and a comet
More informationThe History of Astronomy
The History of Astronomy The History of Astronomy Earliest astronomical record: a lunar calendar etched on bone from 6500 B.C. Uganda. Also we find early groups noted the Sun, Moon, Mercury, Venus, Earth,
More informationChapter 1 The Copernican Revolution
Chapter 1 The Copernican Revolution The Horse Head nebula in the Orion constellation (Reading assignment: Chapter 1) Learning Outcomes How the geocentric model accounts for the retrograde motion of planets?
More informationLooping Planets. towards the modern view. Ptolemy s computational scheme for celestial motion
Reading: Chap. 2, Sec. 2.2, 2.4 Homework 3: Due Friday/Monday Exam 1: 2 weeks from today: Tuesday, Sept. 26, in the evening Public lecture: Tomorrow night 8 p.m., Great Hall, Memorial Union "Water Exploration
More informationChapter 2 The Copernican Revolution
Chapter 2 The Copernican Revolution Units of Chapter 2 2.1 Ancient Astronomy 2.2 The Geocentric Universe 2.3 The Heliocentric Model of the Solar System The Foundations of the Copernican Revolution 2.4
More informationWhat was once so mysterious about planetary motion in our sky? We see apparent retrograde motion when we pass by a planet
What was once so mysterious about planetary motion in our sky? Planets usually move slightly eastward from night to night relative to the stars. You cannot see this motion on a single night. But sometimes
More informationUniversal Gravitation
Universal Gravitation Johannes Kepler Johannes Kepler was a German mathematician, astronomer and astrologer, and key figure in the 17th century Scientific revolution. He is best known for his laws of planetary
More informationFirst MIDTERM Exam: Mon, Sep. 22, covering chapters tutorials (review later today).
Announcements First MIDTERM Exam: Mon, Sep. 22, covering chapters 1 3 + tutorials (review later today). Interim grades online, coded by class ID. See course website Grades tab. Another great night for
More informationBy; Jarrick Serdar, Michael Broberg, Trevor Grey, Cameron Kearl, Claire DeCoste, and Kristian Fors
By; Jarrick Serdar, Michael Broberg, Trevor Grey, Cameron Kearl, Claire DeCoste, and Kristian Fors What is gravity? Gravity is defined as the force of attraction by which terrestrial bodies tend to fall
More informationAstronomy 1 Fall 2016
Astronomy 1 Fall 2016 Comet Halley Edmund Halley, a friend of Newton s used Newton s math to predict the return of a comet seen at intervals of 76 years. Lecture 3; September 29, 2016 Previously on Astro-1
More information1. The Moon appears larger when it rises than when it is high in the sky because
2-1 Copyright 2016 All rights reserved. No reproduction or distribution without the prior written consent of 1. The Moon appears larger when it rises than when it is high in the sky because A. you are
More informationIf Earth had no tilt, what else would happen?
A more in depth explanation from last week: If Earth had no tilt, what else would happen? The equator would be much hotter due to the direct sunlight which would lead to a lower survival rate and little
More informationCh. 22 Origin of Modern Astronomy Pretest
Ch. 22 Origin of Modern Astronomy Pretest Ch. 22 Origin of Modern Astronomy Pretest 1. True or False: Early Greek astronomers (600 B.C. A.D. 150) used telescopes to observe the stars. Ch. 22 Origin of
More informationChapter 3 The Science of Astronomy. Copyright 2012 Pearson Education, Inc.
Chapter 3 The Science of Astronomy 1 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 informationThe Scientific Revolution
The Scientific Revolution What is a Revolution? A Revolution is a complete change, or an overthrow of a government, a social system, etc. The Scientific Revolution In the 1500s and 1600s the Scientific
More informationChapter 4 Thrills and Chills +Math +Depth Acceleration of the Moon +Concepts The Moon is 60 times further away from the center of Earth than objects on the surface of Earth, and moves about Earth in an
More information7.4 Universal Gravitation
Circular Motion Velocity is a vector quantity, which means that it involves both speed (magnitude) and direction. Therefore an object traveling at a constant speed can still accelerate if the direction
More informationOrigins of the Universe
Cosmology Origins of the Universe The study of the universe, its current nature, its origin, and evolution 1 2 The Theory Theory Expansion indicates a denser, hotter past uniform, hot gas that cools as
More informationGat ew ay T o S pace AS EN / AS TR Class # 19. Colorado S pace Grant Consortium
Gat ew ay T o S pace AS EN / AS TR 2500 Class # 19 Colorado S pace Grant Consortium Announcements: - Launch Readiness Review Cards - 11 days to launch Announcements: - Launch Readiness Review Cards - 11
More informationKepler correctly determined the motion of the planets giving his 3 Laws which still hold today for the planets and other orbital motion: moons around
Kepler correctly determined the motion of the planets giving his 3 Laws which still hold today for the planets and other orbital motion: moons around planets, exoplanets around other stars, stars in the
More informationWhat is a Revolution? A Revolution is a complete change, or an overthrow of a government, a social system, etc.
CW10 p374 Vocab What is a Revolution? A Revolution is a complete change, or an overthrow of a government, a social system, etc. The Scientific Revolution In the 1500s and 1600s the Scientific Revolution
More informationHistory of Astronomy
History of Astronomy Aristotle 384 BC 322 BC Greek Philosopher Thought the universe was stable, and always will be Believed in a geocentric universe, where the planets revolved around the Earth Believed
More informationAst ch 4-5 practice Test Multiple Choice
Ast ch 4-5 practice Test Multiple Choice 1. The distance from Alexandria to Syene is about 500 miles. On the summer solstice the sun is directly overhead at noon in Syene. At Alexandria on the summer solstice,
More information