# Reminder: Seasonal Motion

Size: px
Start display at page:

Transcription

1 Seasonal Motion

2 Reminder: Seasonal Motion If you observe the sky at the same time, say midnight, but on a different date, you find that the celestial sphere has turned: different constellations are high in the sky

3 Equivalent Skies Celestial Sphere turns 15º per hour due to daily motion, and 1º per day due to seasonal motion. So fifteen days are equivalent to one hour! Meaning: Stars look the same if you observe 15 days later (date) but 1 hour earlier (time) Example: Same view on Sep 1 10pm and Sep 15 9pm and Sep 30 8pm

4 Cross-Checks In one month the stars rise earlier 2 hours compared to the sun Makes sense, since 4 min/day x 30 days = 120 min = 2 hours After 6 month we have to observe 6 x 2 hours =12 hours earlier The stars visible at midnight half a year earlier are now visisble at noon Makes sense, since earth has traveled to the other side of its orbit

5 Fast and slow motion of the sun added together: Sun is slower than the stars, but still pretty fast The sun moves from east to west daily, i.e. fast Additionally, it moves with respect to the stars slowly from west to east this is the seasonal motion Added together the sun moves west, but slower than the stars, cf. moving backwards on a schoolbus

6 School Bus Analogy You are slowly moving to the back of the bus, i.e. eastward East The school bus is going westward fast With respect to an observer on the ground you are going westward, but slower than the schoolbus West You = the sun, school bus = the celestial spehere, i.e. stars, Observer on the ground = Observer on earth

7 How do we see that the Earth is moving around the Sun or v.v.? Small discrepancy between sun s motion and motion of stars Sidereal vs solar day At noon, say, the sun is not exactly in front of the same stars on the next day. It is exactly in the south The stars are faster, so a little west of south

8 Eventually, the sun drifts slowly into the next zodiac constellation 4 min/day = 2 hr/mo = 12 hr/ ½ year Also: 2 hr = 30 deg, and 30 degrees = one constellation So: 12 constellations per year, 1 for each month

9 Two simple rotations around different axes and an observer oriented in a third direction This explains a lot of features of the universe as observed in the sky! Daily rising and setting Different lengths of days (sun moving wrt cel.eq.) Different altitude of sun at noon at different dates Different altitude of sun at noon at different latitudes Solar/sidereal day are different

10 The Path of the Sun Which path does the sun trace out with respect to the stars? The earth goes around the sun in the plane of the ecliptic, so expect celestial equator, but this is wrong due to Earth s axis tilt See Skygazer: path of the sun

11 Axis Tilt Ecliptic The Earth s rotation axis is tilted 23½ with respect to the plane of its orbit around the sun This means the path of the sun among the stars (called ecliptic) is a circle tilted 23½ wrt the celestial equator Rotation axis pointing to NCP, not SCP Path around sun

12 Position of Ecliptic on the Celestial Sphere Earth s equator is tilted w.r.t. ecliptic by 23 ½ degrees Sun appears to be sometime above (e.g. summer solstice), sometimes below, and sometimes on the celestial equator

13 The Sun appears sometimes among the stars above the Celestial Equator, and sometimes amongst the southern stars March 21 March (vernal) equinox June 21 northern Solstice September 23 September (autumnal) equinox December 21 southern Solstice

14 The Seasons Change of seasons is a result of the tilt of the Earth s rotation axis with respect to the plane of the ecliptic Sun, moon, planets run along the ecliptic

15 Is the sun rising in the East? Typically NOT, only Mar 21/Sep23! See for yourself! Study variation of the rising/setting points of the sun over time Need at least 10 sunrises or sunsets; more is better Measure time and azimuth (angle relative to North) Note position of sunrise/sunset on horizon Measure angle to that position relative to some fixed landmark (mountain, etc.)

### Daily Motions. Daily Motions. Solar and Sidereal Days. Annual Motions of the Sun. Coordinate system on Earth. Annual Motion of the Stars.

Sun: rises in the east sets in the west travels on an arc across the sky 24 hours Daily Motions Solar Day = 24 hours Stars: stars travel on arcs in the sky moving from east to west. some stars rise and

### Appearance of the Sky Orientation Motion of sky Seasons Precession (?)

Today Appearance of the Sky Orientation Motion of sky Seasons Precession (?) The Celestial Sphere Stars at different distances all appear to lie on the celestial sphere. The ecliptic is the Sun s apparent

### Chapter 1: Discovering the Night Sky. The sky is divided into 88 unequal areas that we call constellations.

Chapter 1: Discovering the Night Sky Constellations: Recognizable patterns of the brighter stars that have been derived from ancient legends. Different cultures have associated the patterns with their

### Appearance of the Sky Orientation Motion of sky Seasons Precession (?)

Today Appearance of the Sky Orientation Motion of sky Seasons Precession (?) The Celestial Sphere Stars at different distances all appear to lie on the celestial sphere. The ecliptic is the Sun s apparent

### Motion of the Sun. motion relative to the horizon. rises in the east, sets in the west on a daily basis. Basis for the unit of time, the DAY

Motion of the Sun motion relative to the horizon rises in the east, sets in the west on a daily basis Basis for the unit of time, the DAY noon: highest point of Sun in sky relative to the horizon 1 altitude:

### A Warm Up Exercise. The Motion of the Sun. A Warm Up Exercise. A Warm Up Exercise. A Warm Up Exercise

A Warm Up Exercise The Motion of the Sun Which of the following is NOT true of a circumpolar star? a) It rises and sets from my latitude b) Its direction can be far North c) Its direction can be far South

### 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

### 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.

ASTR 110L 5 - Seasons Purpose: To plot the distance of the Earth from the Sun over one year and to use the celestial sphere to understand the cause of the seasons. What do you think? Write answers to questions

### Before you Sit. Please Pick-up: Blue Information Sheet for Evening Observing. 1 Red and 1 Blue ticket for Observing/ Planetarium

Before you Sit Please Pick-up: Blue Information Sheet for Evening Observing. 1 Red and 1 Blue ticket for Observing/ Planetarium Evening Observing Observing at the Brooks Observatory: Three different weeks

### Motions of the Earth

Motions of the Earth Our goals for learning: What are the main motions of the Earth in space? How do we see these motions on the ground? How does it affect our lives? How does the orientation of Earth's

### 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

### Chapter 1 Image Slides. Copyright The McGraw-Hill Companies, Inc. Permission required for reproduction or display.

Chapter 1 Image Slides Copyright The McGraw-Hill Companies, Inc. Permission required for reproduction or display. CH. 1: CYCLES OF THE SKY CO a 1.1 The Celestial Sphere CO b The nearest star to us is about

### Aileen A. O Donoghue Priest Associate Professor of Physics

SOAR: The Sky in Motion Life on the Tilted Teacup Ride The Year Aileen A. O Donoghue Priest Associate Professor of Physics Celestial Coordinates Right Ascension RA or From prime meridian (0 h ) to 23 h

### Introduction to Astronomy

Introduction to Astronomy AST0111-3 (Astronomía) Semester 2014B Prof. Thomas H. Puzia Theme Our Sky 1. Celestial Sphere 2. Diurnal Movement 3. Annual Movement 4. Lunar Movement 5. The Seasons 6. Eclipses

### Name: Date: 5. The bright stars Vega, Deneb, and Altair form A) the summer triangle. B) the winter triangle. C) the Big Dipper. D) Orion, the Hunter.

Name: Date: 1. If there are about 6000 stars in the entire sky that can be seen by the unaided human eye, about how many stars would be seen at a particular instant on a given dark night from a single

### 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

### Astronomy 101: 9/18/2008

Astronomy 101: 9/18/2008 Announcements Pick up a golf ball at the front of the class or get one from Alex; you will need it for an in-class activity today. You will also need the question sheet from Alex.

### 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

### Precession and The Celestial Poles

1 Precession and The Celestial Poles The North Celestial Pole lies overhead for an observer at the North Pole and on the horizon for an observer on the Equator The altitude of the pole equals your latitude.

### Astronomy 291. Professor Bradley M. Peterson

Astronomy 291 Professor Bradley M. Peterson The Sky As a first step, we need to understand the appearance of the sky. Important points (to be explained): The relative positions of stars remain the same

### Observing the Universe for Yourself

Observing the Universe for Yourself Figure 6-20 Solar-System Formation What does the universe look like from Earth? With the naked eye, we can see more than 2,000 stars as well as the Milky Way. A constellation

### 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.

### Brock University. Test 1, October 2016 Number of pages: 9 Course: ASTR 1P01 Number of Students: 500 Date of Examination: October 3, 2016

Brock University Test 1, October 2016 Number of pages: 9 Course: ASTR 1P01 Number of Students: 500 Date of Examination: October 3, 2016 Number of hours: 50 min Time of Examination: 17:00 17:50 Instructor:

### A2 Principi di Astrofisica. Coordinate Celesti

A2 Principi di Astrofisica Coordinate Celesti ESO La Silla Tel. 3.6m Celestial Sphere Our lack of depth perception when we look into space creates the illusion that Earth is surrounded by a celestial sphere.

### Name: Exam 1, 9/30/05

Multiple Choice: Select the choice that best answers each question. Write your choice in the blank next to each number. (2 points each) 1. At the North Pole in mid-november, the sun rises at a. North of

### Celestial Sphere Spectroscopy (Something interesting; e.g., advanced data analyses with IDL)

AST326, 2010 Winter Semester Celestial Sphere Spectroscopy (Something interesting; e.g., advanced data analyses with IDL) Practical Assignment: analyses of Keck spectroscopic data from the instructor (can

### 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

### Chapter 2 Discovering the Universe for Yourself

Chapter 2 Discovering the Universe for Yourself 2.1 Patterns in the Night Sky Our goals for learning: What does the universe look like from Earth? Why do stars rise and set? Why do the constellations we

### 10/17/2012. Observing the Sky. Lecture 8. Chapter 2 Opener

Observing the Sky Lecture 8 Chapter 2 Opener 1 Figure 2.1 Figure 2.2 2 Figure 2.6 Figure 2.4 Annotated 3 The Celestial Sphere The celestial sphere is the vast hollow sphere on which the stars appear fixed.

### Brock University. Test 1, September 2014 Number of pages: 9 Course: ASTR 1P01 Number of Students: 500 Date of Examination: September 29, 2014

Brock University Test 1, September 2014 Number of pages: 9 Course: ASTR 1P01 Number of Students: 500 Date of Examination: September 29, 2014 Number of hours: 50 min Time of Examination: 18:00 18:50 Instructor:

### Chapter 0 2/19/2014. Lecture Outline. 0.1 The Obvious View. Charting the Heavens. 0.1 The Obvious View. 0.1 The Obvious View. Units of Chapter 0

Lecture Outline Chapter 0 Charting the Heavens Earth is average we don t occupy any special place in the universe Universe: Totality of all space, time, matter, and energy Astronomy: Study of the universe

### 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

### 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

### 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

### 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

### 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:

### Practice Questions: Seasons #1

1. Seasonal changes on Earth are primarily caused by the A) parallelism of the Sun's axis as the Sun revolves around Earth B) changes in distance between Earth and the Sun C) elliptical shape of Earth's

### Chapter 2 Discovering the Universe for Yourself

Chapter 2 Discovering the Universe for Yourself 2.1 Patterns in the Night Sky Our goals for learning: What does the universe look like from Earth? Why do stars rise and set? Why do the constellations we

### Chapter 2 Discovering the Universe for Yourself. What does the universe look like from Earth? Constellations. 2.1 Patterns in the Night Sky

Chapter 2 Discovering the Universe for Yourself 2.1 Patterns in the Night Sky Our goals for learning: What does the universe look like from Earth? Why do stars rise and set? Why do the constellations we

### Astronomy 122 Section 1 TR Outline. The Earth is Rotating. Question Digital Computer Laboratory

Astronomy 122 Section 1 TR 1300-1350 Outline 1320 Digital Computer Laboratory Leslie Looney Phone: 244-3615 Email: lwlw@wuiucw. wedu Office: Astro Building #218 Office Hours: T 10:30-11:30 a.m. or by appointment

### Exercise 7.0 THE CHANGING DIURNAL CIRCLES OF THE SUN

Exercise 7.0 THE CHANGING DIURNAL CIRCLES OF THE SUN I. The Apparent Annual Motion of the Sun A star always rises and sets at the same place on the horizon and, hence, it is above the horizon for the same

### Chapter 2 Discovering the Universe for Yourself. Copyright 2012 Pearson Education, Inc.

Chapter 2 Discovering the Universe for Yourself 1 2.1 Patterns in the Night Sky Our goals for learning: What does the universe look like from Earth? Why do stars rise and set? Why do the constellations

### ASTR 1P01 Test 1, May 2018 Page 1 BROCK UNIVERSITY. Test 1: Spring 2018 Number of pages: 10 Course: ASTR 1P01, Section 1 Number of students: 598

ASTR 1P01 Test 1, May 2018 Page 1 BROCK UNIVERSITY Test 1: Spring 2018 Number of pages: 10 Course: ASTR 1P01, Section 1 Number of students: 598 Examination date: 12 May 2018 Time limit: 50 min Time of

### Chapter 2 Lecture. The Cosmic Perspective Seventh Edition. Discovering the Universe for Yourself

Chapter 2 Lecture The Cosmic Perspective Seventh Edition Discovering the Universe for Yourself Discovering the Universe for Yourself 2.1 Patterns in the Night Sky Our goals for learning: What does the

### Aileen A. O Donoghue Priest Associate Professor of Physics

SOAR: The Sky in Motion Life on the Tilted Teacup Ride Celestial Coordinates and the Day Aileen A. O Donoghue Priest Associate Professor of Physics Reference Points Poles Equator Prime Meridian Greenwich,

### Admin. 8/29/17. If you re at North Pole, you ll NEVER see stars that are below your horizon. Key Concepts: Lecture 4

Admin. 8/29/17 1. Class website http://www.astro.ufl.edu/~jt/teaching/ast1002/ 2. Optional Discussion sections (start Aug. 30th) (see me at end of lecture if you can t make one of these times)! Tuesday

### ASTR 1P01 Test 1, September 2018 Page 1 BROCK UNIVERSITY

ASTR 1P01 Test 1, September 2018 Page 1 BROCK UNIVERSITY Test 1: Fall 2018 Number of pages: 9 Course: ASTR 1P01, Section 2 Number of students: 1300 Examination date: 29 September 2018 Time limit: 50 min

### Chapter 2 Lecture. The Cosmic Perspective Seventh Edition. Discovering the Universe for Yourself Pearson Education, Inc.

Chapter 2 Lecture The Cosmic Perspective Seventh Edition Discovering the Universe for Yourself Discovering the Universe for Yourself 2.1 Patterns in the Night Sky Our goals for learning: What does the

### 6/17. Universe from Smallest to Largest:

6/17 Universe from Smallest to Largest: 1. Quarks and Leptons fundamental building blocks of the universe size about 0 (?) importance: quarks combine together to form neutrons and protons. One of the leptons

### Cartesian Coordinates Need two dimensional system 2 number lines perpendicular to each other X-axis is horizontal Y-axis is vertical Position relative

General Physical Science Chapter 15 Place and Time Space and Time Einstein Space and time related Single entity Time is the 4 th dimension! Cartesian Coordinates Need some system to tell us where something

### Lecture 2 Motions in the Sky September 10, 2018

1 Lecture 2 Motions in the Sky September 10, 2018 2 What is your year in school? A. New freshman B. Returning freshman C. Sophomore D. Junior E. Senior F. I ve been here, like, forever 3 What is your major?

### The Sky Perceptions of the Sky

The Sky Perceptions of the Sky An Observer-Centered Hemisphere Night & Day - Black & Blue - Stars & Sun Atmospheric & Astronomical Phenomena Weather, Clouds, Rainbows,... versus Sun, Moon, Stars, Planets,...

### The celestial sphere, the coordinates system, seasons, phases of the moon and eclipses. Chapters 2 and S1

The celestial sphere, the coordinates system, seasons, phases of the moon and eclipses Chapters 2 and S1 The celestial sphere and the coordinates system Chapter S1 How to find our way in the sky? Let s

### The ecliptic and the sidereal motion of the sun Moon and the planets on it.

The ecliptic and the sidereal motion of the sun Moon and the planets on it. The following picture is a picture of the sky as it looks about noon on May 18 2012. The light of the Sun has been erased artificially

### Knowing the Heavens. Goals: Constellations in the Sky

Goals: Knowing the Heavens To see how the sky changes during a night and from night to night. To measure the positions of stars in celestial coordinates. To understand the cause of the seasons. Constellations

### PHYS 160 Astronomy Test #1 Fall 2017 Version B

PHYS 160 Astronomy Test #1 Fall 2017 Version B 1 I. True/False (1 point each) Circle the T if the statement is true, or F if the statement is false on your answer sheet. 1. An object has the same weight,

### 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?

### Astro 210 Lecture 3 Jan 22, 2018

Astro 210 Lecture 3 Jan 22, 2018 Announcements HW1 available; due online in pdf at 5:00pm Friday Office hours: Instructor 2-3pm Wed; TA 3:30-4:30pm Thurs register your iclicker; link on course moodle site

### Knowing the Heavens. Goals: Constellations in the Sky

Goals: Knowing the Heavens To see how the sky changes during a night and from night to night. To measure the positions of stars in celestial coordinates. To understand the cause of the seasons. Constellations

### Earth-Sun Relationships. The Reasons for the Seasons

Earth-Sun Relationships The Reasons for the Seasons Solar Radiation The earth intercepts less than one two-billionth of the energy given off by the sun. However, the radiation is sufficient to provide

### Discovering the Universe for Yourself (Chapter 2) Years, Seasons, and Months: The Motions of Sun, Earth, and Moon

Discovering the Universe for Yourself (Chapter 2) Years, Seasons, and Months: The Motions of Sun, Earth, and Moon Based on Chapter 2 This material will be useful for understanding Chapters 3 and 4 on The

### Astronomy 122 TR Chemistry Annex. Outline. Question. The Data Look up at the night sky. What are the Data?

Leslie Looney Phone: 244-3615 Email: lwlw@wuiucw. wedu Office: Astro Building #218 Office Hours: W 11:00 a.m noon or by appointment Astronomy 122 TR 1300-1350 112 Chemistry Annex Homework #1 due Sunday

### Oberth: Energy vs. Momentum

1 2 The Oberth Effect 3 Oberth: Energy vs. Momentum 4 The Celestial Sphere From our perspective on Earth the stars appear embedded on a distant 2-dimensional surface the Celestial Sphere. 5 The Celestial

### Time, coordinates and how the Sun and Moon move in the sky

Time, coordinates and how the Sun and Moon move in the sky Using the colors and magnitudes of quasars drawn from the SDSS Catalog Archive Server to distinguish quasars from stars using the light they emit

### LOCATING CELESTIAL OBJECTS: COORDINATES AND TIME. a. understand the basic concepts needed for any astronomical coordinate system.

UNIT 2 UNIT 2 LOCATING CELESTIAL OBJECTS: COORDINATES AND TIME Goals After mastery of this unit, you should: a. understand the basic concepts needed for any astronomical coordinate system. b. understand

### Astro 101 Lab #2. Start up the Stellarium program. If you do not remember how to use the user interface, please refer to Lab#1 or the user s guide.

Name: Astro 101 Lab #2 Lab objectives 1) Learn about how the Sun s path, through the sky, changes with the changing seasons. 2) Learn about how the Sun s path changes while viewing it at different locations

### Brock University. Test 1, October 2017 Number of pages: 9 Course: ASTR 1P01, Section 1 Number of Students: 470 Date of Examination: October 3, 2017

Brock University Test 1, October 2017 Number of pages: 9 Course: ASTR 1P01, Section 1 Number of Students: 470 Date of Examination: October 3, 2017 Number of hours: 50 min Time of Examination: 17:00 17:50

### Astronomical coordinate systems. ASTR320 Monday January 22, 2018

Astronomical coordinate systems ASTR320 Monday January 22, 2018 Special public talk this week: Mike Brown, Pluto Killer Wednesday at 7:30pm in MPHY204 Other news Munnerlyn lab is hiring student engineers

### UNIT 3: EARTH S MOTIONS

UNIT 3: EARTH S MOTIONS After Unit 3 you should be able to: o Differentiate between rotation and revolution of the Earth o Apply the rates of rotation and revolution to basic problems o Recall the evidence

ASTR1010 Lecture 5 29 Jan 13 Today How the Sky Works: Stars, Seasons, Phases Announcements: Old-Fashioned Homework 1 released tonight on D2L, due ON PAPER next Tuesday at the start of class If you brought

### Practice Questions: Seasons #2

1. How many degrees does the Sun appear to move across the sky in four hours? A) 60 B) 45 C) 15 D) 4 Practice Questions: Seasons #2 2. Base your answer to the following question on the diagram below, which

### 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.

### Astronomy 100 Section 2 MWF Greg Hall

Astronomy 100 Section 2 MWF 1200-1300 100 Greg Hall Leslie Looney Phone: 217-244-3615 Email: lwl @ uiuc. edu Office: Astro Building #218 Office Hours: MTF 10:30-11:30 a.m. or by appointment Class Web Page

### Astronomy 120 Winter 2005 Highlights of Astronomy. First Midterm Examination

Astronomy 120 Winter 2005 Highlights of Astronomy First Midterm Examination Name: MULTIPLE CHOICE: Choose the one best answer from among the five choices for each of the following 6 questions. Each correct

### CHAPTER 2 A USER'S GUIDE TO THE SKY

CHAPTER 2 A USER'S GUIDE TO THE SKY MULTIPLE CHOICE 1. In one way of naming stars, a letter indicates its brightness relative to the other stars in the constellation. a. English b. Arabic c. Greek d. Cyrillic

### TAKEN FROM HORIZONS 7TH EDITION CHAPTER 3 TUTORIAL QUIZ

TAKEN FROM HORIZONS 7TH EDITION CHAPTER 3 TUTORIAL QUIZ 1. When Neap tides are occurring, a. a person experiences the lowest tides close to sunset and sunrise. b. the Sun and the Moon are separated by

### Astr 1050 Mon. Jan. 31, 2017

Astr 1050 Mon. Jan. 31, 2017 Finish Ch. 2: Eclipses & Planetary Motion Seasons Angular Size formula Eclipses Planetary Motion Reading: For Today: Finish Chapter 2 For Monday: Start Chapter 3 Homework on

### Astron 104 Laboratory #2 The Celestial Sphere

Name: Date: Section: Astron 104 Laboratory #2 The Celestial Sphere Basic Setup Once the celestial sphere is properly setup, it will serve as an exact model of the heavens relative to your location on Earth.

### Introduction to the sky

Introduction to the sky On a clear, moonless night, far from city lights, the night sky is magnificent. Roughly 2000 stars are visible to the unaided eye. If you know where to look, you can see Mercury,

### James T. Shipman Jerry D. Wilson Charles A. Higgins, Jr. Chapter 15 Place and Time

James T. Shipman Jerry D. Wilson Charles A. Higgins, Jr. Chapter 15 Place and Time Place & Time Read sections 15.5 and 15.6, but ignore the math. Concentrate on those sections that help explain the slides.

### drinking straw, protractor, string, and rock. observer on Earth. Sun across the sky on March 21 as seen by an

1. The diagram below represents some constellations and one position of Earth in its orbit around the Sun. These constellations are visible to an observer on Earth at different times of the year. When

### 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

### Lecture 4: August 30, 2010

Lecture 4: August 30, 2010 How many hospitals are there in the USA? Announcements: First homework has been posted Due Friday (10 th ) First Observatory Opportunity Thursday Night September 2, 8:30pm Will

### Question 1. What motion is responsible for the apparent motion of the constellations (east to west) across the sky?

What motion is responsible for the apparent motion of the constellations (east to west) across the sky? Question 1 1) the motion of Earth around the Sun 2) the motion of the Moon around Earth 3) the motion

### CELESTIAL COORDINATES

ASTR 1030 Astronomy Lab 27 Celestial Coordinates CELESTIAL COORDINATES GEOGRAPHIC COORDINATES The Earth's geographic coordinate system is familiar to everyone - the north and south poles are defined by

### ASTR 1P01 Test 1, September 2017 Page 1 BROCK UNIVERSITY

ASTR 1P01 Test 1, September 2017 Page 1 BROCK UNIVERSITY Test 1: Fall 2017 Number of pages: 10 Course: ASTR 1P01, Section 2 Number of students: 1300 Examination date: 30 September 2017 Time limit: 50 min

### a. 0.1 AU b. 10 AU c light years d light years

1 AST104 Sp2006: EXAM 1 Multiple Choice Questions: Mark the best answer choice on the bubble form. Read all answer choices before making selection. (No credit given when multiple answers are marked.) 1.

### Name and Student ID Section Day/Time:

AY2 - Overview of the Universe - Midterm #1 - Instructor: Maria F. Duran Name and Student ID Section Day/Time: 1) Imagine we ve discovered a planet orbiting another star at 1 AU every 6 months. The planet

### 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

### 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

### 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

### 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

### Brock University. Test 1, May 2014 Number of pages: 9 Course: ASTR 1P01 Number of Students: 500 Date of Examination: May 21, 2014

Brock University Test 1, May 2014 Number of pages: 9 Course: ASTR 1P01 Number of Students: 500 Date of Examination: May 21, 2014 Number of hours: 50 min Time of Examination: 14:00 14:50 Instructor: B.Mitrović

### Topic Guide: The Celestial Sphere. GCSE (9-1) Astronomy. Pearson Edexcel Level 1/Level 2 GCSE (9-1) in Astronomy (1AS0)

Topic Guide: The Celestial Sphere GCSE (9-1) Astronomy Pearson Edexcel Level 1/Level 2 GCSE (9-1) in Astronomy (1AS0) The Celestial Sphere Contents Specification Points 1 The Astronomy 2 Equatorial coordinates

### AST 301 Introduction to Astronomy

AST 301 Introduction to Astronomy John Lacy RLM 16.332 471-1469 lacy@astro.as.utexas.edu Myoungwon Jeon RLM 16.216 471-0445 myjeon@astro.as.utexas.edu Bohua Li RLM 16.212 471-8443 bohuali@astro.as.utexas.edu

### SUBJECT : GEOGRAPHY ROTATION AND REVOLUTION This paper consists of 5 printed pages.

SUBJECT : GEOGRAPHY ROTATION AND REVOLUTION 2017-2018 This paper consists of 5 printed pages. 1. Name the motions of the earth. A. They are Rotation and Revolution. 2. What is Rotation? A. Rotation is

### 4 Solar System and Time

4 olar ystem and Time 4.1 The Universe 4.1.1 Introduction The Universe consists of countless galaxies distributed throughout space. The bodies used in astro navigation belong to the Galaxy known as the

### (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