Final Exam Study Guide

Save this PDF as:
 WORD  PNG  TXT  JPG

Size: px
Start display at page:

Download "Final Exam Study Guide"

Transcription

1 Final Exam Study Guide

2 Final is Comprehensive! Covers content of the entire course Please be sure to look at the Study Guides for the first three in-class exams All of that material will be on the final exam Study the questions on previous exams carefully! This guide covers only the additional material that will be on the final exam from the last two weeks of class

3 The Milky Way: The Milky Way is our Galaxy Diffuse band of light crossing the sky Galileo: Milky Way consists of many faint stars The Nature of the Milky Way Philosophical Speculations: Wright & Kant Star Counts: Herschels & Kapteyn Globular Cluster Distribution: Shapley

4 The Milky Way and Other Galaxies: Disk & Spheroid Structure of the Galaxy Pop I Stars: Young, metal-rich, disk stars Ordered, nearly circular orbits in the disk Pop II Stars: Old, metal-poor, spheroid stars Disordered, elliptical orbits in all directions Gives clues to the formation of the Galaxy.

5 Other Galaxies: Three basic types of Galaxies: Spirals Disk and spheroid component Rotation of disk allows measurement of galaxy mass Ellipticals Irregulars Differ in terms of Relative Gas content Star Formation History Internal Motions Galaxies tend to group into Clusters Groups, clusters, and superclusters Galaxies can collide and merge Some galaxies have active nuclei Powered by large Black holes in the center

6 Special Relativity: Postulates of Special Relativity: The laws of physics are the same for all uniformly moving observers. The speed of light is the same for all observers. Consequences: Different observers measure different times, lengths, and masses. Only spacetime is observer independent.

7 General Relativity: General Relativity: Modern Theory of Gravitation Matter tells spacetime how to curve. Curved spacetime tells matter how to move. Tests of General Relativity: Perihelion Precession of Mercury Bending of Starlight near the Sun The Binary Pulsar (Gravitational Waves)

8 Expansion of the Universe: Hubble s Law: Galaxies are receding from us. Recession velocity gets larger with distance. Hubble Constant: Rate of expansion of the Universe. Cosmological Redshift: Redshift distances Redshift maps of the Universe.

9 Cosmology: Cosmological Principle: The Universe is Homogeneous and Isotropic on Large Scales. No special places or directions. General Relativity predicts an expanding universe. Cosmological Constant

10 Big Bang: Big Bang Model of the Universe Starts in a hot, dense state Universe expands and cools Expansion and Redshift Critical Density Geometry of the Universe Hubble Time = Maximum age of the Universe

11 Evidence for the Big Bang: Fundamental Tests of the Big Bang Primordial Nucleosynthesis Primordial Deuterium & Helium Primordial light elements (Li, B, Be) Cosmic Background Radiation Relic blackbody radiation from Big Bang Temperature: T = K

12 First 3 Minutes in the History of the Universe: Physics of the Early Universe Informed by experimental & theoretical physics The Cosmic Timeline: Observations go back to t~3 minutes Reasonably firm physics back to t~10-6 sec Speculative back before t~10-12 sec Present theories stop at t~10-43 sec

13 Critical Density All galaxies attract each other via gravity. Gravitational attraction slows the expansion. How it behaves depends on the density: High Density: Expansion slows, stops, & reverses. Low Density: Keeps expanding forever. Dividing Line = Critical Density

14 Density Parameter: W W average density of Universe critical density W>1: High Density Closed Universe W=1: Critical Density Open Universe W<1: Low Density Open Universe

15 End of Universe: The Fate of the Universe depends on the density of matter. Closed Universe: Enough matter to stop the expansion Collapses in a Big Crunch Open Universe: Expands forever Ends in a cold, disordered state Dark Energy seems to make this outcome more likely

Island Universes. Up to 1920 s, many thought that Milky Way encompassed entire universe.

Island Universes. Up to 1920 s, many thought that Milky Way encompassed entire universe. Island Universes Up to 1920 s, many thought that Milky Way encompassed entire universe. Observed three types of nebulas (clouds): - diffuse, spiral, elliptical - many were faint, indistinct - originally

More information

Galaxy A has a redshift of 0.3. Galaxy B has a redshift of 0.6. From this information and the existence of the Hubble Law you can conclude that

Galaxy A has a redshift of 0.3. Galaxy B has a redshift of 0.6. From this information and the existence of the Hubble Law you can conclude that Galaxy A has a redshift of 0.3. Galaxy B has a redshift of 0.6. From this information and the existence of the Hubble Law you can conclude that A) Galaxy B is two times further away than Galaxy A. B) Galaxy

More information

Implications of the Hubble Law: - it is not static, unchanging - Universe had a beginning!! - could not have been expanding forever HUBBLE LAW:

Implications of the Hubble Law: - it is not static, unchanging - Universe had a beginning!! - could not have been expanding forever HUBBLE LAW: Cosmology and the Evolution of the Universe Edwin Hubble, 1929: -almost all galaxies have a redshift -moving away from us -greater distance greater redshift Implications of the Hubble Law: - Universe is

More information

Cosmology and the Evolution of the Universe. Implications of the Hubble Law: - Universe is changing (getting bigger!) - it is not static, unchanging

Cosmology and the Evolution of the Universe. Implications of the Hubble Law: - Universe is changing (getting bigger!) - it is not static, unchanging Cosmology and the Evolution of the Edwin Hubble, 1929: -almost all galaxies have a redshift -moving away from us -exceptions in Local Group -with distance measurements - found a relationship greater distance

More information

The Big Bang. Olber s Paradox. Hubble s Law. Why is the night sky dark? The Universe is expanding and We cannot see an infinite Universe

The Big Bang. Olber s Paradox. Hubble s Law. Why is the night sky dark? The Universe is expanding and We cannot see an infinite Universe The Big Bang Olber s Paradox Why is the night sky dark? The Universe is expanding and We cannot see an infinite Universe Hubble s Law v = H0 d v = recession velocity in km/sec d = distance in Mpc H 0 =

More information

Chapter 21 Evidence of the Big Bang. Expansion of the Universe. Big Bang Theory. Age of the Universe. Hubble s Law. Hubble s Law

Chapter 21 Evidence of the Big Bang. Expansion of the Universe. Big Bang Theory. Age of the Universe. Hubble s Law. Hubble s Law Chapter 21 Evidence of the Big Bang Hubble s Law Universal recession: Slipher (1912) and Hubble found that all galaxies seem to be moving away from us: the greater the distance, the higher the redshift

More information

Learning Objectives: Chapter 13, Part 1: Lower Main Sequence Stars. AST 2010: Chapter 13. AST 2010 Descriptive Astronomy

Learning Objectives: Chapter 13, Part 1: Lower Main Sequence Stars. AST 2010: Chapter 13. AST 2010 Descriptive Astronomy Chapter 13, Part 1: Lower Main Sequence Stars Define red dwarf, and describe the internal dynamics and later evolution of these low-mass stars. Appreciate the time scale of late-stage stellar evolution

More information

BROCK UNIVERSITY. Test 2, March 2015 Number of pages: 9 Course: ASTR 1P02 Number of Students: 420 Date of Examination: March 5, 2015

BROCK UNIVERSITY. Test 2, March 2015 Number of pages: 9 Course: ASTR 1P02 Number of Students: 420 Date of Examination: March 5, 2015 BROCK UNIVERSITY Page 1 of 9 Test 2, March 2015 Number of pages: 9 Course: ASTR 1P02 Number of Students: 420 Date of Examination: March 5, 2015 Number of hours: 50 min Time of Examination: 18:00 18:50

More information

Cosmology. Clusters of galaxies. Redshift. Late 1920 s: Hubble plots distances versus velocities of galaxies. λ λ. redshift =

Cosmology. Clusters of galaxies. Redshift. Late 1920 s: Hubble plots distances versus velocities of galaxies. λ λ. redshift = Cosmology Study of the structure and origin of the universe Observational science The large-scale distribution of galaxies Looking out to extremely large distances The motions of galaxies Clusters of galaxies

More information

Moment of beginning of space-time about 13.7 billion years ago. The time at which all the material and energy in the expanding Universe was coincident

Moment of beginning of space-time about 13.7 billion years ago. The time at which all the material and energy in the expanding Universe was coincident Big Bang Moment of beginning of space-time about 13.7 billion years ago The time at which all the material and energy in the expanding Universe was coincident Only moment in the history of the Universe

More information

The best evidence so far in support of the Big Bang theory is:

The best evidence so far in support of the Big Bang theory is: Notes about the final exam: Saturday May 17th, 7:45 AM-9:45 AM Chamberlain 2103 If you have a CONFLICT email me or Ella before the end of this week. No excuses accepted after exam. Comprehensive, covering

More information

TA Final Review. Class Announcements. Objectives Today. Compare True and Apparent brightness. Finding Distances with Cepheids

TA Final Review. Class Announcements. Objectives Today. Compare True and Apparent brightness. Finding Distances with Cepheids Class Announcements Vocab Quiz 4 deadline is Saturday Midterm 4 has started, ends Monday Lab was in the Planetarium. You still need to do the 2 questions Check PS100 webpage, make sure your clicker is

More information

Hubble's Law. H o = 71 km/s / Mpc. The further a galaxy is away, the faster it s moving away from us. V = H 0 D. Modern Data.

Hubble's Law. H o = 71 km/s / Mpc. The further a galaxy is away, the faster it s moving away from us. V = H 0 D. Modern Data. Cosmology Cosmology is the study of the origin and evolution of the Universe, addressing the grandest issues: How "big" is the Universe? Does it have an "edge"? What is its large-scale structure? How did

More information

According to the currents models of stellar life cycle, our sun will eventually become a. Chapter 34: Cosmology. Cosmology: How the Universe Works

According to the currents models of stellar life cycle, our sun will eventually become a. Chapter 34: Cosmology. Cosmology: How the Universe Works Chapter 34: Cosmology According to the currents models of stellar life cycle, our sun will eventually become a a) Cloud of hydrogen gas b) Protostar c) Neutron star d) Black hole e) White dwarf id you

More information

Charles Keeton. Principles of Astrophysics. Using Gravity and Stellar Physics. to Explore the Cosmos. ^ Springer

Charles Keeton. Principles of Astrophysics. Using Gravity and Stellar Physics. to Explore the Cosmos. ^ Springer Charles Keeton Principles of Astrophysics Using Gravity and Stellar Physics to Explore the Cosmos ^ Springer Contents 1 Introduction: Tools of the Trade 1 1.1 What Is Gravity? 1 1.2 Dimensions and Units

More information

BROCK UNIVERSITY. Test 2, March 2018 Number of pages: 9 Course: ASTR 1P02, Section 1 Number of Students: 465 Date of Examination: March 12, 2018

BROCK UNIVERSITY. Test 2, March 2018 Number of pages: 9 Course: ASTR 1P02, Section 1 Number of Students: 465 Date of Examination: March 12, 2018 BROCK UNIVERSITY Page 1 of 9 Test 2, March 2018 Number of pages: 9 Course: ASTR 1P02, Section 1 Number of Students: 465 Date of Examination: March 12, 2018 Number of hours: 50 min Time of Examination:

More information

The Night Sky. The Universe. The Celestial Sphere. Stars. Chapter 14

The Night Sky. The Universe. The Celestial Sphere. Stars. Chapter 14 The Night Sky The Universe Chapter 14 Homework: All the multiple choice questions in Applying the Concepts and Group A questions in Parallel Exercises. Celestial observation dates to ancient civilizations

More information

Chapter 17 Cosmology

Chapter 17 Cosmology Chapter 17 Cosmology Over one thousand galaxies visible The Universe on the Largest Scales No evidence of structure on a scale larger than 200 Mpc On very large scales, the universe appears to be: Homogenous

More information

ASTR 101 General Astronomy: Stars & Galaxies

ASTR 101 General Astronomy: Stars & Galaxies ASTR 101 General Astronomy: Stars & Galaxies ANNOUNCEMENTS MIDTERM III: Tuesday, Nov 24 th Midterm alternate day: Fri, Nov 20th, 11am, ESS 450 At LAST: In the very Beginning BIG BANG: beginning of Time

More information

The Cosmic Microwave Background

The Cosmic Microwave Background The Cosmic Microwave Background The Cosmic Microwave Background Key Concepts 1) The universe is filled with a Cosmic Microwave Background (CMB). 2) The microwave radiation that fills the universe is nearly

More information

If there is an edge to the universe, we should be able to see our way out of the woods. Olber s Paradox. This is called Olber s Paradox

If there is an edge to the universe, we should be able to see our way out of the woods. Olber s Paradox. This is called Olber s Paradox Suppose the Universe were not expanding, but was in some kind of steady state. How should galaxy recession velocities correlate with distance? They should a) be directly proportional to distance. b) reverse

More information

FXA ρ 0 = 3(H 0 ) 2. UNIT G485 Module Universe Evolution. Candidates should be able to : age of the universe 1/H 0

FXA ρ 0 = 3(H 0 ) 2. UNIT G485 Module Universe Evolution. Candidates should be able to : age of the universe 1/H 0 1 Candidates should be able to : Explain that the standard (hot big bang) model of the universe implies a finite age for the universe. Select and use the expression : age of the universe 1/H 0 Describe

More information

Distances to Quasars. Quasars. The Luminosity Puzzle. Seyfert Galaxies. Seyfert galaxies have

Distances to Quasars. Quasars. The Luminosity Puzzle. Seyfert Galaxies. Seyfert galaxies have Quasars In 1963 Martin Schmidt was trying to understand some unidentified lines in the optical spectra from a star that had a strong radio signal He realized that the lines were Balmer lines that were

More information

NAME Test 1 Astronomy May 1 There are 15 multiple choice questions each worth 2 points, and 5 short answer questions each worth 14 points.

NAME Test 1 Astronomy May 1 There are 15 multiple choice questions each worth 2 points, and 5 short answer questions each worth 14 points. NAME Test 1 Astronomy 123 2013 May 1 There are 15 multiple choice questions each worth 2 points, and 5 short answer questions each worth 14 points. The exam is scored for a total of 15 x 2 points + 5 x

More information

Astronomy 114. Lecture35:TheBigBang. Martin D. Weinberg. UMass/Astronomy Department

Astronomy 114. Lecture35:TheBigBang. Martin D. Weinberg. UMass/Astronomy Department Astronomy 114 Lecture35:TheBigBang Martin D. Weinberg weinberg@astro.umass.edu UMass/Astronomy Department A114: Lecture 35 09 May 2005 Read: Ch. 28,29 Astronomy 114 1/18 Announcements PS#8 due Monday!

More information

The Expanding Universe

The Expanding Universe Cosmology Expanding Universe History of the Universe Cosmic Background Radiation The Cosmological Principle Cosmology and General Relativity Dark Matter and Dark Energy Primitive Cosmology If the universe

More information

Homework 6 Name: Due Date: June 9, 2008

Homework 6 Name: Due Date: June 9, 2008 Homework 6 Name: Due Date: June 9, 2008 1. Where in the universe does the general expansion occur? A) everywhere in the universe, including our local space upon Earth, the solar system, our galaxy and

More information

MIT Exploring Black Holes

MIT Exploring Black Holes THE UNIVERSE and Three Examples Alan Guth, MIT MIT 8.224 Exploring Black Holes EINSTEIN'S CONTRIBUTIONS March, 1916: The Foundation of the General Theory of Relativity Feb, 1917: Cosmological Considerations

More information

A100 Exploring the Universe: The Milky Way as a Galaxy. Martin D. Weinberg UMass Astronomy

A100 Exploring the Universe: The Milky Way as a Galaxy. Martin D. Weinberg UMass Astronomy A100 Exploring the Universe: The Milky Way as a Galaxy Martin D. Weinberg UMass Astronomy astron100-mdw@courses.umass.edu November 12, 2014 Read: Chap 19 11/12/14 slide 1 Exam #2 Returned and posted tomorrow

More information

Astronomy 150: Killer Skies Lecture 35, April 23

Astronomy 150: Killer Skies Lecture 35, April 23 Assignments: ICES available online Astronomy 150: Killer Skies Lecture 35, April 23 HW11 due next Friday: last homework! note: lowest HW score dropped but: HW11 material will be on Exam 3, so be sure to

More information

Lecture 32: Astronomy 101

Lecture 32: Astronomy 101 Lecture 32: Evidence for the Big Bang Astronomy 101 The Three Pillars of the Big Bang Threefundamental pieces of evidence: Expansion of the Universe: Explains Hubble s Law Primordial Nucleosynthesis: Formation

More information

Olbers Paradox. Lecture 14: Cosmology. Resolutions of Olbers paradox. Cosmic redshift

Olbers Paradox. Lecture 14: Cosmology. Resolutions of Olbers paradox. Cosmic redshift Lecture 14: Cosmology Olbers paradox Redshift and the expansion of the Universe The Cosmological Principle Ω and the curvature of space The Big Bang model Primordial nucleosynthesis The Cosmic Microwave

More information

Cosmology: Building the Universe.

Cosmology: Building the Universe. Cosmology: Building the Universe. The term has several different meanings. We are interested in physical cosmology - the study of the origin and development of the physical universe, and all the structure

More information

Chapter 30. Galaxies and the Universe. Chapter 30:

Chapter 30. Galaxies and the Universe. Chapter 30: Chapter 30 Galaxies and the Universe Chapter 30: Galaxies and the Universe Chapter 30.1: Stars with varying light output allowed astronomers to map the Milky Way, which has a halo, spiral arm, and a massive

More information

The Dawn of Time - II. A Cosmos is Born

The Dawn of Time - II. A Cosmos is Born The Dawn of Time - II. A Cosmos is Born Learning Objectives! Why does Olbers paradox show the Universe began?! How does Hubble s Law tell us the age of the Universe? If Hubble s Constant is large, is the

More information

Prentice Hall EARTH SCIENCE

Prentice Hall EARTH SCIENCE Prentice Hall EARTH SCIENCE Tarbuck Lutgens Chapter 25 Beyond Our Solar System 25.1 Properties of Stars Characteristics of Stars A constellation is an apparent group of stars originally named for mythical

More information

Lecture 11. The standard Model

Lecture 11. The standard Model Lecture 11 The standard Model Standard Model The standard model assumes that the universe is filled with matter and other forms of energy (photons) but that matter is dominant today. The standard model

More information

Astronomy Stars, Galaxies and Cosmology Exam 3. Please PRINT full name

Astronomy Stars, Galaxies and Cosmology Exam 3. Please PRINT full name Astronomy 132 - Stars, Galaxies and Cosmology Exam 3 Please PRINT full name Also, please sign the honor code: I have neither given nor have I received help on this exam The following exam is intended to

More information

Today. Course Evaluations Open. Modern Cosmology. The Hot Big Bang. Age & Fate. Density and Geometry. Microwave Background

Today. Course Evaluations Open. Modern Cosmology. The Hot Big Bang. Age & Fate. Density and Geometry. Microwave Background Today Modern Cosmology The Hot Big Bang Age & Fate Density and Geometry Microwave Background Course Evaluations Open Cosmology The study of the universe as a physical system Historically, people have always

More information

AST-1002 Section 0459 Review for Final Exam Please do not forget about doing the evaluation!

AST-1002 Section 0459 Review for Final Exam Please do not forget about doing the evaluation! AST-1002 Section 0459 Review for Final Exam Please do not forget about doing the evaluation! Bring pencil #2 with eraser No use of calculator or any electronic device during the exam We provide the scantrons

More information

The Big Bang Theory PRESS Chung Wai Man Camus, Wong Lai Yin Rita, Kum Kit Ying Cathy, Yeung Shuet Wah Sarah, Yu Wai Sze Alice

The Big Bang Theory PRESS Chung Wai Man Camus, Wong Lai Yin Rita, Kum Kit Ying Cathy, Yeung Shuet Wah Sarah, Yu Wai Sze Alice The Big Bang Theory PRESS-2002 Chung Wai Man Camus, Wong Lai Yin Rita, Kum Kit Ying Cathy, Yeung Shuet Wah Sarah, Yu Wai Sze Alice Supervised by: Dr KY Szeto, HKUST Abstract: We did a survey at our current

More information

Lecture 20 Cosmology, Inflation, dark matter

Lecture 20 Cosmology, Inflation, dark matter The Nature of the Physical World November 19th, 2008 Lecture 20 Cosmology, Inflation, dark matter Arán García-Bellido 1 News Exam 2: good job! Ready for pick up after class or in my office Average: 74/100

More information

The King's University College Astronomy 201 Mid-Term Exam Solutions

The King's University College Astronomy 201 Mid-Term Exam Solutions The King's University College Astronomy 201 Mid-Term Exam Solutions Instructions: The exam consists of two sections. Part A is 20 multiple choice questions - please record answers on the sheet provided.

More information

Big Galaxies Are Rare! Cepheid Distance Measurement. Clusters of Galaxies. The Nature of Galaxies

Big Galaxies Are Rare! Cepheid Distance Measurement. Clusters of Galaxies. The Nature of Galaxies Big Galaxies Are Rare! Potato Chip Rule: More small things than large things Big, bright spirals are easy to see, but least common Dwarf ellipticals & irregulars are most common Faint, hard to see Mostly

More information

Directed Reading A. Section: The Life Cycle of Stars TYPES OF STARS THE LIFE CYCLE OF SUNLIKE STARS A TOOL FOR STUDYING STARS.

Directed Reading A. Section: The Life Cycle of Stars TYPES OF STARS THE LIFE CYCLE OF SUNLIKE STARS A TOOL FOR STUDYING STARS. Skills Worksheet Directed Reading A Section: The Life Cycle of Stars TYPES OF STARS (pp. 444 449) 1. Besides by mass, size, brightness, color, temperature, and composition, how are stars classified? a.

More information

Energy Source for Active Galactic Nuclei

Energy Source for Active Galactic Nuclei Quasars Quasars are small, extremely luminous, extremely distant galactic nuclei Bright radio sources Name comes from Quasi-Stellar Radio Source, as they appeared to be stars! Can have clouds of gas near

More information

Cosmology. Lecture Topics. Colliding Galaxy Simulations The expanding universe Cosmology. The Age of the Universe The Big Bang

Cosmology. Lecture Topics. Colliding Galaxy Simulations The expanding universe Cosmology. The Age of the Universe The Big Bang Cosmology Lecture 27: Cosmology 27 1 APOD: GOODS project Lecture Topics Colliding Galaxy Simulations The expanding universe Cosmology The cosmological principle The Age of the Universe The Big Bang 2 27-1

More information

The Contents of the Universe (or/ what do we mean by dark matter and dark energy?)

The Contents of the Universe (or/ what do we mean by dark matter and dark energy?) The Contents of the Universe (or/ what do we mean by dark matter and dark energy?) Unseen Influences Dark Matter: An undetected form of mass that emits little or no light but whose existence we infer from

More information

Cosmology. Chapter 18. Cosmology. Observations of the Universe. Observations of the Universe. Motion of Galaxies. Cosmology

Cosmology. Chapter 18. Cosmology. Observations of the Universe. Observations of the Universe. Motion of Galaxies. Cosmology Cosmology Chapter 18 Cosmology Cosmology is the study of the structure and evolution of the Universe as a whole How big is the Universe? What shape is it? How old is it? How did it form? What will happen

More information

A100H Exploring the Universe: Discovering Galaxies. Martin D. Weinberg UMass Astronomy

A100H Exploring the Universe: Discovering Galaxies. Martin D. Weinberg UMass Astronomy A100H Exploring the Universe: Discovering Galaxies Martin D. Weinberg UMass Astronomy astron100h-mdw@courses.umass.edu April 05, 2016 Read: Chap 19 04/05/16 slide 1 Exam #2 Returned by next class meeting

More information

BROCK UNIVERSITY. Test 2: June 2016 Number of pages: 10 Course: ASTR 1P02, Section 2 Number of students: 359

BROCK UNIVERSITY. Test 2: June 2016 Number of pages: 10 Course: ASTR 1P02, Section 2 Number of students: 359 BROCK UNIVERSITY Page 1 of 10 Test 2: June 2016 Number of pages: 10 Course: ASTR 1P02, Section 2 Number of students: 359 Examination date: 25 June 2016 Time limit: 50 min Time of Examination: 13:00 13:50

More information

i>clicker Quiz #14 Which of the following statements is TRUE?

i>clicker Quiz #14 Which of the following statements is TRUE? i>clicker Quiz #14 Which of the following statements is TRUE? A. Hubble s discovery that most distant galaxies are receding from us tells us that we are at the center of the Universe B. The Universe started

More information

Study Guide Chapter 2

Study Guide Chapter 2 Section: Stars Pages 32-38 Study Guide Chapter 2 Circle the letter of the best answer for each question. 1. What do scientists study to learn about stars? a. gravity c. space b. starlight d. colors COLOR

More information

Beyond Our Solar System Chapter 24

Beyond Our Solar System Chapter 24 Beyond Our Solar System Chapter 24 PROPERTIES OF STARS Distance Measuring a star's distance can be very difficult Stellar parallax Used for measuring distance to a star Apparent shift in a star's position

More information

LESSON 1. Solar System

LESSON 1. Solar System Astronomy Notes LESSON 1 Solar System 11.1 Structure of the Solar System axis of rotation period of rotation period of revolution ellipse astronomical unit What is the solar system? 11.1 Structure of the

More information

Lab Monday optional: review for Quiz 3. Lab Tuesday optional: review for Quiz 3.

Lab Monday optional: review for Quiz 3. Lab Tuesday optional: review for Quiz 3. Announcements SEIs! Quiz 3 Friday. Lab Monday optional: review for Quiz 3. Lab Tuesday optional: review for Quiz 3. Lecture today, Wednesday, next Monday. Final Labs Monday & Tuesday next week. Quiz 3

More information

The Early Universe: A Journey into the Past

The Early Universe: A Journey into the Past Gravity: Einstein s General Theory of Relativity The Early Universe A Journey into the Past Texas A&M University March 16, 2006 Outline Gravity: Einstein s General Theory of Relativity Galileo and falling

More information

Astronomy 150: Killer Skies. Lecture 35, April 23

Astronomy 150: Killer Skies. Lecture 35, April 23 Assignments: ICES available online Astronomy 150: Killer Skies HW11 due next Friday: last homework! Lecture 35, April 23 note: lowest HW score dropped but: HW11 material will be on Exam 3, so be sure to

More information

The Early Universe: A Journey into the Past

The Early Universe: A Journey into the Past The Early Universe A Journey into the Past Texas A&M University March 16, 2006 Outline Galileo and falling bodies Galileo Galilei: all bodies fall at the same speed force needed to accelerate a body is

More information

What is the solar system?

What is the solar system? Notes Astronomy What is the solar system? 11.1 Structure of the Solar System Our solar system includes planets and dwarf planets, their moons, a star called the Sun, asteroids and comets. Planets, dwarf

More information

ASTR Final Examination Phil Armitage, Bruce Ferguson

ASTR Final Examination Phil Armitage, Bruce Ferguson ASTR 1120-001 Final Examination Phil Armitage, Bruce Ferguson FINAL EXAM MAY 6 th 2006: Closed books and notes, 1.5 hours. Please PRINT your name and student ID on the places provided on the scan sheet.

More information

The Milky Way - Chapter 23

The Milky Way - Chapter 23 The Milky Way - Chapter 23 The Milky Way Galaxy A galaxy: huge collection of stars (10 7-10 13 ) and interstellar matter (gas & dust). Held together by gravity. Much bigger than any star cluster we have

More information

A 103 Notes, Week 14, Kaufmann-Comins Chapter 15

A 103 Notes, Week 14, Kaufmann-Comins Chapter 15 NEARBY GALAXIES I. Brief History A 103 Notes, Week 14, Kaufmann-Comins Chapter 15 A. Kant B. Curtis-Shapley debate C. Distance to Andromeda II. Classification of nearby galaxies: Spirals, Ellipticals,

More information

8/30/2010. Classifying Stars. Classifying Stars. Classifying Stars

8/30/2010. Classifying Stars. Classifying Stars. Classifying Stars Classifying Stars In the early 1900s, Ejnar Hertzsprung and Henry Russell made some important observations. They noticed that, in general, stars with higher temperatures also have brighter absolute magnitudes.

More information

Homework #9. Chapter 19 questions are for PRACTICE ONLY they will not factor into your Homework #9 grade, but will help you prepare for Exams #4/#5.

Homework #9. Chapter 19 questions are for PRACTICE ONLY they will not factor into your Homework #9 grade, but will help you prepare for Exams #4/#5. Homework #9 Due Wednesday, April 25, 11:59PM Covers Chapters 18 and 17 Estimated time to complete: 40 minutes Read chapters, review notes before starting Last homework of the semester Chapter 19 questions

More information

Astronomy 1504 Section 10 Final Exam Version 1 May 6, 1999

Astronomy 1504 Section 10 Final Exam Version 1 May 6, 1999 Astronomy 1504 Section 10 Final Exam Version 1 May 6, 1999 Reminder: When I write these questions, I believe that there is one one correct answer. The questions consist of all parts a e. Read the entire

More information

Testing the Big Bang Idea

Testing the Big Bang Idea Reading: Chapter 29, Section 29.2-29.6 Third Exam: Tuesday, May 1 12:00-2:00 COURSE EVALUATIONS - please complete these online (recitation and lecture) Last time: Cosmology I - The Age of the & the Big

More information

Question 1. Question 2. Correct. Chapter 16 Homework. Part A

Question 1. Question 2. Correct. Chapter 16 Homework. Part A Chapter 16 Homework Due: 11:59pm on Thursday, November 17, 2016 To understand how points are awarded, read the Grading Policy for this assignment. Question 1 Following are a number of distinguishing characteristics

More information

Chapter 18. Cosmology. Copyright The McGraw-Hill Companies, Inc. Permission required for reproduction or display.

Chapter 18. Cosmology. Copyright The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Chapter 18 Cosmology Copyright The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Cosmology Cosmology is the study of the structure and evolution of the Universe as a whole

More information

Today. Last homework Due next time FINAL EXAM: 8:00 AM TUE Dec. 14 Course Evaluations Open. Modern Cosmology. Big Bang Nucleosynthesis.

Today. Last homework Due next time FINAL EXAM: 8:00 AM TUE Dec. 14 Course Evaluations Open. Modern Cosmology. Big Bang Nucleosynthesis. Today Modern Cosmology Big Bang Nucleosynthesis Dark Matter Dark Energy Last homework Due next time FINAL EXAM: 8:00 AM TUE Dec. 14 Course Evaluations Open Elements of Modern Cosmology 1.Expanding Universe

More information

Lecture Outlines. Chapter 26. Astronomy Today 8th Edition Chaisson/McMillan Pearson Education, Inc.

Lecture Outlines. Chapter 26. Astronomy Today 8th Edition Chaisson/McMillan Pearson Education, Inc. Lecture Outlines Chapter 26 Astronomy Today 8th Edition Chaisson/McMillan Chapter 26 Cosmology Units of Chapter 26 26.1 The Universe on the Largest Scales 26.2 The Expanding Universe 26.3 The Fate of the

More information

Cosmology, Galaxies, and Stars OUR VISIBLE UNIVERSE

Cosmology, Galaxies, and Stars OUR VISIBLE UNIVERSE Cosmology, Galaxies, and Stars OUR VISIBLE UNIVERSE Cosmology Cosmology is the study of the universe; its nature, origin and evolution. General Relativity is the mathematical basis of cosmology from which

More information

Chapter 23: Dark Matter, Dark Energy & Future of the Universe. Galactic rotation curves

Chapter 23: Dark Matter, Dark Energy & Future of the Universe. Galactic rotation curves Chapter 23: Dark Matter, Dark Energy & Future of the Universe Galactic rotation curves Orbital speed as a function of distance from the center: rotation_of_spiral_galaxy.htm Use Kepler s Third Law to get

More information

Active Galaxies and Galactic Structure Lecture 22 April 18th

Active Galaxies and Galactic Structure Lecture 22 April 18th Active Galaxies and Galactic Structure Lecture 22 April 18th FINAL Wednesday 5/9/2018 6-8 pm 100 questions, with ~20-30% based on material covered since test 3. Do not miss the final! Extra Credit: Thursday

More information

ASTR 1P02 Test 2, March 2017 Page 1 BROCK UNIVERSITY. Test 2: March 2017 Number of pages: 9 Course: ASTR 1P02, Section 2 Number of students: 1193

ASTR 1P02 Test 2, March 2017 Page 1 BROCK UNIVERSITY. Test 2: March 2017 Number of pages: 9 Course: ASTR 1P02, Section 2 Number of students: 1193 ASTR 1P02 Test 2, March 2017 Page 1 BROCK UNIVERSITY Test 2: March 2017 Number of pages: 9 Course: ASTR 1P02, Section 2 Number of students: 1193 Examination date: 4 March 2017 Time limit: 50 min Time of

More information

Lecture PowerPoints. Chapter 33 Physics: Principles with Applications, 7 th edition Giancoli

Lecture PowerPoints. Chapter 33 Physics: Principles with Applications, 7 th edition Giancoli Lecture PowerPoints Chapter 33 Physics: Principles with Applications, 7 th edition Giancoli This work is protected by United States copyright laws and is provided solely for the use of instructors in teaching

More information

Galaxies: The Nature of Galaxies

Galaxies: The Nature of Galaxies Galaxies: The Nature of Galaxies The Milky Way The Milky Way is visible to the unaided eye at most place on Earth Galileo in 1610 used his telescope to resolve the faint band into numerous stars In the

More information

Class 5 Cosmology Large-Scale Structure of the Universe What do we see? Big Bang Cosmology What model explains what we see?

Class 5 Cosmology Large-Scale Structure of the Universe What do we see? Big Bang Cosmology What model explains what we see? Class 1 Introduction, Background History of Modern Astronomy The Night Sky, Eclipses and the Seasons Kepler's Laws Newtonian Gravity General Relativity Matter and Light Telescopes Class 2 Solar System

More information

Isotropy and Homogeneity

Isotropy and Homogeneity Cosmic inventory Isotropy and Homogeneity On large scales the Universe is isotropic (looks the same in all directions) and homogeneity (the same average density at all locations. This is determined from

More information

The Universe and Galaxies. Adapted from:

The Universe and Galaxies. Adapted from: The Universe and Galaxies Adapted from: http://www.west-jefferson.k12.oh.us/earthandspacescience.aspx Astronomy The study of objects and matter outside the Earth s atmosphere and of their physical and

More information

Exam # 3 Tue 12/06/2011 Astronomy 100/190Y Exploring the Universe Fall 11 Instructor: Daniela Calzetti

Exam # 3 Tue 12/06/2011 Astronomy 100/190Y Exploring the Universe Fall 11 Instructor: Daniela Calzetti Exam # 3 Tue 12/06/2011 Astronomy 100/190Y Exploring the Universe Fall 11 Instructor: Daniela Calzetti INSTRUCTIONS: Please, use the `bubble sheet and a pencil # 2 to answer the exam questions, by marking

More information

Chapter 15 Galaxies and the Foundation of Modern Cosmology

Chapter 15 Galaxies and the Foundation of Modern Cosmology 15.1 Islands of stars Chapter 15 Galaxies and the Foundation of Modern Cosmology Cosmology: study of galaxies What are they 3 major types of galaxies? Spiral galaxies: like the milky way, look like flat,

More information

Chapter 15 The Milky Way Galaxy. The Milky Way

Chapter 15 The Milky Way Galaxy. The Milky Way Chapter 15 The Milky Way Galaxy The Milky Way Almost everything we see in the night sky belongs to the Milky Way We see most of the Milky Way as a faint band of light across the sky From the outside, our

More information

Killer Skies. Last time: Hubble s Law Today: Big Bang. HW 11 due next Monday Exam 3, Dec 11. Music: Rocket Man Elton John

Killer Skies. Last time: Hubble s Law Today: Big Bang. HW 11 due next Monday Exam 3, Dec 11. Music: Rocket Man Elton John Killer Skies HW 11 due next Monday Exam 3, Dec 11 Last time: Hubble s Law Today: Big Bang Music: Rocket Man Elton John 1 Hour Exam 3 Hour Exam 3 Wed, Dec 11th, in class information on course website 40

More information

ASTR 1120 General Astronomy: Stars & Galaxies. OUR Universe: Accelerating Universe

ASTR 1120 General Astronomy: Stars & Galaxies. OUR Universe: Accelerating Universe ASTR 1120 General Astronomy: Stars & Galaxies FINAL: Saturday, Dec 12th, 7:30pm, HERE ALTERNATE FINAL: Monday, Dec 7th, 5:30pm in Muenzinger E131 Last OBSERVING session, Tue, Dec.8th, 7pm Please check

More information

Astronomy 210 Final. Astronomy: The Big Picture. Outline

Astronomy 210 Final. Astronomy: The Big Picture. Outline Astronomy 210 Final This Class (Lecture 40): The Big Bang Next Class: The end HW #11 Due next Weds. Final is May 10 th. Review session: May 6 th or May 9 th? Designed to be 2 hours long 1 st half is just

More information

Lecture 37 Cosmology [not on exam] January 16b, 2014

Lecture 37 Cosmology [not on exam] January 16b, 2014 1 Lecture 37 Cosmology [not on exam] January 16b, 2014 2 Structure of the Universe Does clustering of galaxies go on forever? Looked at very narrow regions of space to far distances. On large scales the

More information

Cosmology: The Origin and Evolution of the Universe Chapter Twenty-Eight. Guiding Questions

Cosmology: The Origin and Evolution of the Universe Chapter Twenty-Eight. Guiding Questions Cosmology: The Origin and Evolution of the Universe Chapter Twenty-Eight Guiding Questions 1. What does the darkness of the night sky tell us about the nature of the universe? 2. As the universe expands,

More information

Cosmology. What is Cosmology?

Cosmology. What is Cosmology? Cosmology What is Cosmology? The study of the structure and evolution of the entire universe The idea is to form picture of the entire Universe: origin, size, and future We will make assumptions that what

More information

(Astronomy for Dummies) remark : apparently I spent more than 1 hr giving this lecture

(Astronomy for Dummies) remark : apparently I spent more than 1 hr giving this lecture (Astronomy for Dummies) remark : apparently I spent more than 1 hr giving this lecture A.D. 125? Ptolemy s geocentric model Planets ( ) wander among stars ( ) For more info: http://aeea.nmns.edu.tw/aeea/contents_list/universe_concepts.html

More information

Exam 3 Astronomy 114

Exam 3 Astronomy 114 Exam 3 Astronomy 114 Select the answer that is the most appropriate among the choices given. 1. What is the Hubble law? (A) a relation between a galaxy s mass and radius. (B) a rule that describes the

More information

29:50 Stars, Galaxies, and the Universe Final Exam December 13, 2010 Form A

29:50 Stars, Galaxies, and the Universe Final Exam December 13, 2010 Form A 29:50 Stars, Galaxies, and the Universe Final Exam December 13, 2010 Form A There are 40 questions. Read each question and all of the choices before choosing. Budget your time. No whining. Walk with Ursus!

More information

The Continuing Copernican Revolution...

The Continuing Copernican Revolution... The Continuing Copernican Revolution... from Heliocentricity to the Cosmological Principle Astro 203 Vanderbilt University 2006/10/19 Prof. Rob Knop Slides online at: http://brahms.phy.vanderbilt.edu/~rknop/classes/talkslides#awayfmctr

More information

Answers. The Universe. Year 10 Science Chapter 6

Answers. The Universe. Year 10 Science Chapter 6 Answers The Universe Year 10 Science Chapter 6 p133 1 The universe is considered to be the whole of all matter, energy, planets, solar systems, galaxies, and space. Many definitions of the universe also

More information

Early (Expanding) Universe. Average temperature decreases with expansion.

Early (Expanding) Universe. Average temperature decreases with expansion. Early (Expanding) Universe Average temperature decreases with expansion. Particles & Anti-Particles Very short wavelength photons collide and form electron-positron pairs. E=mc 2 electron=matter positron=antimatter

More information

BROCK UNIVERSITY. Test 2: July 2015 Number of pages: 9 Course: ASTR 1P02, Section 2 Number of students: 318

BROCK UNIVERSITY. Test 2: July 2015 Number of pages: 9 Course: ASTR 1P02, Section 2 Number of students: 318 BROCK UNIVERSITY Page 1 of 9 Test 2: July 2015 Number of pages: 9 Course: ASTR 1P02, Section 2 Number of students: 318 Examination date: 4 July 2015 Time limit: 50 min Time of Examination: 13:00 13:50

More information

ASTR 135 Exam 4 5/4/2015

ASTR 135 Exam 4 5/4/2015 ASTR 135 Exam 4 5/4/2015 1) The Milky Way is a a) star b) star cluster d) nebula c) galaxy e) universe 2) What distance indicator or method did Edwin Hubble use to establish the distance of the Andromeda

More information