# Unit 7 Review Guide: The Universe

Save this PDF as:

Size: px
Start display at page:

## Transcription

1 Unit 7 Review Guide: The Universe Light Year: Unit of distance used to measure the great vastness of space. Galaxy: Large group of stars, gas, and dust held together by gravity. Spiral Galaxy: Galaxy in the shape of a giant pinwheel, with spiral arms, central bulge and a halo. Elliptical Galaxy: Galaxy in the shape of a 3-D ellipse. Irregular Galaxy: Galaxies with no obvious structure. Milky Way: Our home galaxy. Big Bang: Sudden expansion of space, which is thought to have created our universe. H-R Diagram: Diagram that graphs all the stars visible from Earth based on their temperature and luminosity. Main Sequence Stars: Average stars. Nebula: Cloud of dust and gas, from which stars are born. Protostar: Nebula which is almost a star. White Dwarf: Core that remains when a medium mass star dies. Nuetron Stars: Core that remains when a heavy (1.4 3x s the mass of the sun) star dies. Black Holes: Core that remains when a heavy (3x s the mass of the sun) star dies. Parallax Shift: Apparent shift in a star s position due to our changing view from Earth. Magnitude: Another word for brightness Apparent Magnitude: How bright a star looks from Earth. Absolute Magnitude: Measurement of the brightness of a star.

2 Practice Problems: 1. The pictures show the same stars at different times. Which hypothesis is best supported by these data? A. The stars are moving toward one another. B. The three stars are moving very fast. C. One star is moving around another star. D. The biggest star is closest to Earth. 2. A star might be much brighter than it appears to be. This is called the star s absolute magnitude. The difference in apparent magnitude and absolute magnitude is due primarily to the star s A. Surface temperature B. Motion through the universe C. diameter D. distance from the earth 3. A student sees a very bright star in the sky and thinks it might be the planet Venus. Which observation would lend support to this conclusion? A. After a few minutes, its position is relative to the surrounding has changed significantly. B. After an hour, its position relative to the horizon has changed. C. After an hour, its brightness has faded significantly. D. After a month, its position relative to the surrounding stars has changed. 4. The pole star, Polaris, is nearly stationary and straight overhead when seen from the North Pole. When viewed from the Equator, it A. Is nearly stationary and on the horizon B. Is nearly stationary and directly overhead C. rises barely above the eastern horizon, and sets in the west D. rises straight up in the east< passes directly overhead, and descends straight down in the west

3 5. Parallax can be used to measure a star s A. Distance from Earth B. Atmospheric temperature C. Gravitational strength D. Surface composition 6. What is the position of the star above the horizon? A. 35 B. 40 C. 55 D Which of these elements does this star contain? A. Mercury B. Calcium C. Sodium D. Neon

4 8. In the late 1920s, Edwin Hubble and Milton Humason determined the distance to a number of galaxies and the velocity of those galaxies relative to the Earth. The graph shows the early results that were obtained. What approximate ratio did the scientists calculate between velocity and distance based on these early findings? A. 150 kilometers per second per one million light years B. 300 kilometers per second per one million light years C. 450 kilometers per second per one million light years D. 600 kilometers per second per one million light years 9. Which image below best represents our galaxy? A. B. C. D.

5 10. What element is the main component of most stars? A. Nitrogen B. Iron C. Hydrogen D. Oxygen 11. Why do stars appear to change position in the night? A. Earth rotates on its axis B. Earth revolves around the sun C. The stars are moving away from each other D. Stars are very far away from the solar system 12. In 1912, an astronomer at Arizona s Lowell Observatory noticed that the lines in the spectra of most galaxies shifted toward the red end of the spectrum. Another American astronomer, Edwin hubble, later interpreted this discovery as evidence that A. Galaxies were once part of one huge mega galaxy. B. An explosion will one day result from the pressure building as the galaxies expand. C. Galaxies are moving away from each other in a constantly expanding universe. D. The largest galaxies are slowly engulfing their smaller neighbors 13. A light year measures A. Brightness B. Distance C. Radiation D. Time

6 14. What is the first stage in the life cycle of a star? A. Black hole B. Dwarf star C. Main-sequence star D. Stellar nebula 15. Which of these facts is the best supporting evidence that the universe is expanding A. The stars very in chemical composition. B. The galaxies are moving away from each other. C. The galaxies can spin to form eddies. D. The universe is filled with galaxies of different size. 16. Which of the above evolutionary stages of a massive star is called a supernova? A. 1 B. 2 C. 3 D. 4

### CHAPTER 28 STARS AND GALAXIES

CHAPTER 28 STARS AND GALAXIES 28.1 A CLOSER LOOK AT LIGHT Light is a form of electromagnetic radiation, which is energy that travels in waves. Waves of energy travel at 300,000 km/sec (speed of light Ex:

### Figure 19.19: HST photo called Hubble Deep Field.

19.3 Galaxies and the Universe Early civilizations thought that Earth was the center of the universe. In the sixteenth century, we became aware that Earth is a small planet orbiting a medium-sized star.

### 25.2 Stellar Evolution. By studying stars of different ages, astronomers have been able to piece together the evolution of a star.

25.2 Stellar Evolution By studying stars of different ages, astronomers have been able to piece together the evolution of a star. Star Birth The birthplaces of stars are dark, cool interstellar clouds,

### 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

### 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.

### 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

### 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

### Chapter Introduction Lesson 1 The View from Earth Lesson 2 The Sun and Other Stars Lesson 3 Evolution of Stars Lesson 4 Galaxies and the Universe

Chapter Introduction Lesson 1 The View from Earth Lesson 2 The Sun and Other Stars Lesson 3 Evolution of Stars Lesson 4 Galaxies and the Universe Chapter Wrap-Up What makes up the universe and how does

### The Universe and Galaxies

The Universe and Galaxies 16.1 http://dingo.care-mail.com/cards/flash/5409/galaxy.swf Universe The sum of all matter and energy that exists, that has ever existed, and that will ever exist. We will focus

### 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

### 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

### Chapter 24. Stars, Galaxies & the Universe. Distance units

Chapter 24 Stars, Galaxies & the Universe Distance units To talk about space we need to come up with distance units a little more appropriate than just miles. Otherwise it would be like measuring from

### Galaxies and the Universe

Standard 7.3.1: Recognize and describe that the Sun is a medium-sized star located near the edge of a diskshaped galaxy of stars and that the universe contains many billions of galaxies and each galaxy

### Life Cycle of a Star - Activities

Name: Class Period: Life Cycle of a Star - Activities A STAR IS BORN STAGES COMMON TO ALL STARS All stars start as a nebula. A nebula is a large cloud of gas and dust. Gravity can pull some of the gas

### THE UNIVERSE CHAPTER 20

THE UNIVERSE CHAPTER 20 THE UNIVERSE UNIVERSE everything physical in and Includes all space, matter, and energy that has existed, now exists, and will exist in the future. How did our universe form, how

### Galaxies and Star Systems

Chapter 5 Section 5.1 Galaxies and Star Systems Galaxies Terms: Galaxy Spiral Galaxy Elliptical Galaxy Irregular Galaxy Milky Way Galaxy Quasar Black Hole Types of Galaxies A galaxy is a huge group of

### Chapter 23 The Milky Way Galaxy Pearson Education, Inc.

Chapter 23 The Milky Way Galaxy The Milky Way is our own galaxy viewed from the inside. It is a vast collection of more than 200 billion stars, planets, nebulae, clusters, dust and gas. Our own sun and

### outline 1. in the beginning. The Big Bang 2. galaxies -- different types 3. stars -- life cycle 4. the solar system -- sun and planets

Earth s Place in the Universe outline 1. in the beginning. The Big Bang 2. galaxies -- different types 3. stars -- life cycle 4. the solar system -- sun and planets the big bang the universe is expanding

### 2) On a Hertzsprung-Russell diagram, where would you find red giant stars? A) upper right B) lower right C) upper left D) lower left

Multiple choice test questions 2, Winter Semester 2015. Based on parts covered after mid term. Essentially on Ch. 12-2.3,13.1-3,14,16.1-2,17,18.1-2,4,19.5. You may use a calculator and the useful formulae

### CHAPTER 9: STARS AND GALAXIES

CHAPTER 9: STARS AND GALAXIES Characteristics of the Sun 1. The Sun is located about 150 million kilometres from the Earth. 2. The Sun is made up of hot gases, mostly hydrogen and helium. 3. The size of

### TEACHER BACKGROUND INFORMATION

TEACHER BACKGROUND INFORMATION (The Universe) A. THE UNIVERSE: The universe encompasses all matter in existence. According to the Big Bang Theory, the universe was formed 10-20 billion years ago from a

### Star Formation A cloud of gas and dust, called a nebula, begins spinning & heating up. Eventually, it gets hot enough for fusion to take place, and a

Stars Star- large ball of gas held together by gravity that produces tremendous amounts of energy and shines Sun- our closest star Star Formation A cloud of gas and dust, called a nebula, begins spinning

### 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

### Formation of the Universe

A. The Universe 1. 2. 3. How did the universe begin? Only one exists or are there more? Composed of space and 100 billion galaxies A galaxy is a grouping of millions or billions of stars kept together

### 1UNIT. The Universe. What do you remember? Key language. Content objectives

1UNIT The Universe What do you remember? What are the points of light in this photo? What is the difference between a star and a planet? a moon and a comet? Content objectives In this unit, you will Learn

### UNIT 3: Astronomy Chapter 26: Stars and Galaxies (pages )

CORNELL NOTES Directions: You must create a minimum of 5 questions in this column per page (average). Use these to study your notes and prepare for tests and quizzes. Notes will be turned in to your teacher

### Stars. The composition of the star It s temperature It s lifespan

Stars Stars A star is a ball of different elements in the form of gases The elements and gases give off electromagnetic radiation (from nuclear fusion) in the form of light Scientists study the light coming

### Coriolis Effect - the apparent curved paths of projectiles, winds, and ocean currents

Regents Earth Science Unit 5: Astronomy Models of the Universe Earliest models of the universe were based on the idea that the Sun, Moon, and planets all orbit the Earth models needed to explain how the

### This Week in Astronomy

Homework #8 Due Wednesday, April 18, 11:59PM Covers Chapters 15 and 16 Estimated time to complete: 40 minutes Read chapters, review notes before starting This Week in Astronomy Credit: NASA/JPL-Caltech

### Remember from Stefan-Boltzmann that 4 2 4

Lecture 17 Review Most stars lie on the Main sequence of an H&R diagram including the Sun, Sirius, Procyon, Spica, and Proxima Centauri. This figure is a plot of logl versus logt. The main sequence is

### 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

### CHAPTER 4 STARS, GALAXIES & THE UNIVERSE

CHAPTER 4 STARS, GALAXIES & THE UNIVERSE LESSON 1: TELESCOPES ALL TYPES OF ELECTROMAGNETIC RADIATION TRAVEL AT THE SPEED OF LIGHT 186,000 miles per second!! Electromagnetic Radiation = energy that travels

### D. most intense and of longest duration C. D.

Astronomy Take Home Test Answer on a separate sheet of paper In complete sentences justify your answer Name: 1. The Moon s cycle of phases can be observed from Earth because the Moon 4. The accompanying

### In the centre of the galaxies is where most of the stars are concentrated. Each object from a galaxy moves because of the others attraction.

What is a galaxy? During the major part of our history, human beings could observe the galaxies as vague smears in the night sky. However, we know that galaxies are enormous accumulation of stars, gas

### Galaxies and Stars. 3. Base your answer to the following question on The reaction below represents an energy-producing process.

Galaxies and Stars 1. To an observer on Earth, the Sun appears brighter than the star Rigel because the Sun is A) hotter than Rigel B) more luminous than Rigel C) closer than Rigel D) larger than Rigel

### Galaxies & Introduction to Cosmology

Galaxies & Introduction to Cosmology Other Galaxies: How many are there? Hubble Deep Field Project 100 hour exposures over 10 days Covered an area of the sky about 1/100 the size of the full moon Probably

### Unit 1: Space. Section 2- Stars

Unit 1: Space Section 2- Stars Stars Recall: stars are celestial bodies of hot gas that give off heat and light Stars The milky way contains hundreds of billions of stars and is only one of hundreds of

### Galaxies. The majority of known galaxies fall into one of three major classes: spirals (78 %), ellipticals (18 %) and irregulars (4 %).

Galaxies Collection of stars, gas and dust bound together by their common gravitational pull. Galaxies range from 10,000 to 200,000 light-years in size. 1781 Charles Messier 1923 Edwin Hubble The distribution

### Galaxies. Beyond the Book. FOCUS Book. Make a model that helps demonstrate how the universe is expanding. Follow these steps:

FOCUS Book Galaxies Make a model that helps demonstrate how the universe is expanding. Follow these steps: 1 Use markers to make dots on the outside of an uninflated balloon to represent galaxies full

### 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!

### 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

### Galaxies and the expansion of the Universe

Review of Chapters 14, 15, 16 Galaxies and the expansion of the Universe 5/4/2009 Habbal Astro 110-01 Review Lecture 36 1 Recap: Learning from Light How does light tell us what things are made of? Every

### THE MILKY WAY GALAXY BACKGROUND READING FOR MIDDLE AND HIGH SCHOOL SCIENCE

THE MILKY WAY GALAXY BACKGROUND READING FOR MIDDLE AND HIGH SCHOOL SCIENCE The Milky Way Galaxy The Milky Way is a huge collection of stars, dust and gas. It s called a spiral galaxy because if you could

### ASTRONOMY QUIZ NUMBER 11

ASTRONOMY QUIZ NUMBER. Suppose you measure the parallax of a star and find 0. arsecond. The distance to this star is A) 0 light-years B) 0 parsecs C) 0. light-year D) 0. parsec 2. A star is moving toward

### Astronomy in the news? Patriots goal-line interception

Monday, February 2, 2015 First exam Friday. First Sky Watch Due. Review sheet posted Today. Review session Thursday, 5 6 PM, RLM 6.104 Reading: Chapter 6 Supernovae, Sections 6.1, 6.2, 6.3 Chapter 1 Introduction,

### Introduction to the Universe

What makes up the Universe? Introduction to the Universe Book page 642-644 Objects in the Universe Astrophysics is the science that tries to make sense of the universe by - describing the Universe (Astronomy)

### The Earth in the Universe

The Earth in the Universe (OCR) Evidence for the age of the Earth Scientists once thought that the Earth was only 6000 years old. Rocks have provided lots of evidence for the world being older. 1) Erosion

### Beyond the Solar System 2006 Oct 17 Page 1 of 5

I. Stars have color, brightness, mass, temperature and size. II. Distances to stars are measured using stellar parallax a. The further away, the less offset b. Parallax angles are extremely small c. Measured

### The Electromagnetic Spectrum

The Electromagnetic Spectrum Three Kinds of Spectra Sun: The Nearest Star Radius 696,000 km 109 Re Mass 2 x 10^30 kg 300,000 Me Density 1400 kg/m^3 Luminosity 3.8x10^26 Watts (board calc.) Comp. 70% H,

### Chapter 19 Reading Quiz Clickers. The Cosmic Perspective Seventh Edition. Our Galaxy Pearson Education, Inc.

Reading Quiz Clickers The Cosmic Perspective Seventh Edition Our Galaxy 19.1 The Milky Way Revealed What does our galaxy look like? How do stars orbit in our galaxy? Where are globular clusters located

### 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

### A supernova is the explosion of a star. It is the largest explosion that takes place in space.

What is a supernova? By NASA, adapted by Newsela staff on 03.28.17 Word Count 974 Level 1110L TOP: A vivid view of a supernova remnant captured by NASA's Spitzer and Chandra space observatories and the

### Lunar Eclipse. Solar Eclipse

Lunar Eclipse SUN Moon Solar Eclipse SUN SUN Moon Total solar eclipse Partial solar eclipse Moon Phases What does the moon look like from at each position? G H F A E B D C SUNLIGHT Refracting Telescopes

### It is about 100,000 ly across, 2,000 ly thick, and our solar system is located 26,000 ly away from the center of the galaxy.

The Galaxies The Milky Way Galaxy Is a spiral galaxy in which our solar system is located. The center of the galaxy lies in the Sagittarius Constellation. It is about 100,000 ly across, 2,000 ly thick,

### Number of Stars: 100 billion (10 11 ) Mass : 5 x Solar masses. Size of Disk: 100,000 Light Years (30 kpc)

THE MILKY WAY GALAXY Type: Spiral galaxy composed of a highly flattened disk and a central elliptical bulge. The disk is about 100,000 light years (30kpc) in diameter. The term spiral arises from the external

### Geoscience Astronomy Formative on Stellar Evolution and Galaxies

Name: Class: _ Date: _ Geoscience Astronomy Formative on Stellar Evolution and Galaxies Multiple Choice Identify the choice that best completes the statement or answers the question. 1. What are binary

### Reminders! Observing Projects: Both due Monday. They will NOT be accepted late!!!

Reminders! Website: http://starsarestellar.blogspot.com/ Lectures 1-15 are available for download as study aids. Reading: You should have Chapters 1-14 read. Read Chapters 15-17 by the end of the week.

### The Universe. But first, let s talk about light! 2012 Pearson Education, Inc.

The Universe But first, let s talk about light! Light is fast! The study of light All forms of radiation travel at 300,000,000 meters (186,000 miles) per second Since objects in space are so far away,

### Our Solar System: A Speck in the Milky Way

GALAXIES Lesson 2 Our Solar System: A Speck in the Milky Way The Milky Way appears to be curved when we view it but in reality it is a straight line. It is curved due to the combination of pictures taken

### UNIT 3 The Study of the. Universe. Chapter 7: The Night Sky. Chapter 8: Exploring Our Stellar Neighbourhood. Chapter 9:The Mysterious.

UNIT 3 The Study of the Universe Chapter 7: The Night Sky Chapter 8: Exploring Our Stellar Neighbourhood Chapter 9:The Mysterious Universe CHAPTER 9 The Mysterious Universe In this chapter, you will: identify

### The Universe. 3. Base your answer to the following question on The diagram below represents the bright-line spectrum for an element.

A) B) The Universe 1. According to the Big Bang theory, which graph hest represents the relationship between time and the size of the universe from the beginning of the universe to the present? C) D) 2.

### Birth & Death of Stars

Birth & Death of Stars Objectives How are stars formed How do they die How do we measure this The Interstellar Medium (ISM) Vast clouds of gas & dust lie between stars Diffuse hydrogen clouds: dozens of

### Astronomy Part 1 Regents Questions

Regents Questions 1. The Sun revolves around the center of A) Polaris B) Aldebaran C) Earth D) the Milky Way Galaxy 4. In which sequence are the items listed from least total mass to greatest total mass?

### 18. Which graph best represents the relationship between the number of sunspots and the amount of magnetic activity in the Sun?

1. Which star has a surface temperature most similar to the surface temperature of Alpha Centauri? A) Polaris B) Betelgeuse C) Procyon B D) Sirius 2. Giant stars have greater luminosity than our sun mainly

### Star systems like our Milky Way. Galaxies

Galaxies Star systems like our Milky Way Galaxies Contain a few thousand to tens of billions of stars,as well as varying amounts of gas and dust Large variety of shapes and sizes Gas and Dust in

### STARS AND GALAXIES. Part I: A Trip Through the Universe What We Will See

STARS AND GALAXIES Part I: A Trip Through the Universe What We Will See 1 FIRST STOP ALPHA CENTAURI Multiple Star Systems More than 80% of stars are part of multiple star systems that consist of two or

### o Terms to know o Big Bang Theory o Doppler Effect o Redshift o Universe

Standard 1: Students will understand the scientific evidence that supports theories that explain how the universe and the solar system developed. They will compare Earth to other objects in the solar system.

### National Aeronautics and Space Administration. Glos. Glossary. of Astronomy. Terms. Related to Galaxies

National Aeronautics and Space Administration Glos of Astronomy Glossary Terms Related to Galaxies Asterism: A pattern formed by stars not recognized as one of the official 88 constellations. Examples

### Earth in the Universe Unit Notes

Earth in the Universe Unit Notes The Universe - everything everywhere, 15-20 billion years old Inside the universe there are billions of Galaxies Inside each Galaxy there are billions of Solar Systems

### Earth-based parallax measurements have led to the conclusion that the Pleiades star cluster is about 435 light-years from Earth.

1 The Pleiades star cluster is a prominent sight in the night sky. All the stars in the cluster were formed from the same gas cloud. Hence the stars have nearly identical ages and compositions, but vary

### Sit in your appropriate seat quietly Have all necessary materials out All back packs on the floor All cell phones on silent and away in backpacks All

Sit in your appropriate seat quietly Have all necessary materials out All back packs on the floor All cell phones on silent and away in backpacks All IPods off and headphones out of your ears Hats off

### Outline 8: History of the Universe and Solar System

Outline 8: History of the Universe and Solar System The Andromeda Galaxy One of hundreds of billions of galaxies, each with hundreds of billions of stars A warped spiral galaxy, 150 MLY away and 100,000

### Chapter 19: Our Galaxy

Chapter 19 Lecture Chapter 19: Our Galaxy Our Galaxy 19.1 The Milky Way Revealed Our goals for learning: What does our galaxy look like? How do stars orbit in our galaxy? What does our galaxy look like?

### Chapter 26 Section 1 pages Directed Reading Section: Viewing the Universe

Name: Period: Chapter 26 Section 1 pages 659-666 Directed Reading Section: Viewing the Universe 1. How did observations of the sky help sailors in the past? 2. What is the main reason people study the

### M42 (The Orion Nebula) and M43

3.4b demonstrate an understanding that emission nebulae, absorption nebulae and open clusters are associated with the birth of stars 3.4c demonstrate an understanding that planetary nebulae and supernovae

### The Death of Stars. Today s Lecture: Post main-sequence (Chapter 13, pages ) How stars explode: supernovae! White dwarfs Neutron stars

The Death of Stars Today s Lecture: Post main-sequence (Chapter 13, pages 296-323) How stars explode: supernovae! White dwarfs Neutron stars White dwarfs Roughly the size of the Earth with the mass of

### Chapter 9: Measuring the Stars

Chapter 9: Measuring the Stars About 10 11 (100,000,000,000) stars in a galaxy; also about 10 11 galaxies in the universe Stars have various major characteristics, the majority of which fall into several

### Galaxies. What is a Galaxy? A bit of History. A bit of History. Three major components: 1. A thin disk consisting of young and intermediate age stars

What is a Galaxy? Galaxies A galaxy is a collection of billions of stars, dust, and gas all held together by gravity. Galaxies are scattered throughout the universe. They vary greatly in size and shape.

### Chapter 25: Beyond our Solar System The Universe pp

Chapter 25: Beyond our Solar System 25.3 The Universe pp 715-721 The Milky Way Galaxy On a clear and moonless night, away from city lights, you might see a a band of light in the sky. This band is The

### 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

### What do the Roman numerals mean and how do stars die

What do the Roman numerals mean and how do stars die What is luminosity? Luminosity is the energy emitted from a star, or basically how bright it is compared to our Sun The higher the luminosity, the higher

### Stars and Galaxies. Evolution of Stars

Stars and Galaxies Evolution of Stars What do you think? Read the two statements below and decide whether you agree or disagree with them. Place an A in the Before column if you agree with the statement

### 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

### 2.) 3.) Igneous Sedimentary Metamorphic Characteristic:

Grade / Name: Date: Period: CATALYST 1.) 2.) 3.) Igneous Sedimentary Metamorphic Characteristic: 1 OBJECTIVE SWBAT describe the life cycle of a star SWBAT identify the major source of 'power' in stars

### Notes for Wednesday, July 16; Sample questions start on page 2 7/16/2008

Notes for Wednesday, July 16; Sample questions start on page 2 7/16/2008 Wed, July 16 MW galaxy, then review. Start with ECP3Ch14 2 through 8 Then Ch23 # 8 & Ch 19 # 27 & 28 Allowed Harlow Shapely to locate

### How does the galaxy rotate and keep the spiral arms together? And what really lies at the center of the galaxy?

Ch 14: Mysteries of the Milky Way How does the galaxy rotate and keep the spiral arms together? And what really lies at the center of the galaxy? The Structure of the Galaxy We know that our galaxy has

### The Milky Way. Finding the Center. Milky Way Composite Photo. Finding the Center. Milky Way : A band of and a. Milky Way

The Milky Way Milky Way : A band of and a The band of light we see is really 100 billion stars Milky Way probably looks like Andromeda. Milky Way Composite Photo Milky Way Before the 1920 s, astronomers

### telescopes resolve it into many faint (i.e. distant) stars What does it tell us?

The Milky Way From a dark site the Milky Way can be seen as a broad band across the sky What is it? telescopes resolve it into many faint (i.e. distant) stars What does it tell us? that we live in a spiral

### Science Benchmark: 06 : 04 Standard 04: Stargazing universe, the light-year, speed of light Grade Benchmark Standard Page

Science Benchmark: 06 : 04 The sun is one of billions of stars in the Milky Way Galaxy, that is one of billions of galaxies in the universe. Scientists use a variety of tools to investigate the nature

### 2004 Pearson Education Inc., publishing as Addison-Wesley

By tracing their orbits and using our understanding of gravity, we can conclude that the object these stars are orbiting (shown here as a 5- pointed star) must have a mass over 2.5 million times greater

### The Stars. Chapter 14

The Stars Chapter 14 Great Idea: The Sun and other stars use nuclear fusion reactions to convert mass into energy. Eventually, when a star s nuclear fuel is depleted, the star must burn out. Chapter Outline

### Recall what you know about the Big Bang.

What is this? Recall what you know about the Big Bang. Most of the normal matter in the universe is made of what elements? Where do we find most of this normal matter? Interstellar medium (ISM) The universe

### Which letter on the timeline best represents the time when scientists estimate that the Big Bang occurred? A) A B) B C) C D) D

1. The red shift of light from most galaxies is evidence that A) most galaxies are moving away from Earth B) a majority of stars in most galaxies are red giants C) the light slows down as it nears Earth

### Ay162, Spring 2006 Week 8 p. 1 of 15

Astronomy 162, Week 8 Milky Way Galaxy, continued Patrick S. Osmer Spring, 2006 Rotation of Galaxy How do we know the galaxy is rotating, and how do we measure its rotation? Measure radial velocities of

### The Milky Way Galaxy

1/5/011 The Milky Way Galaxy Distribution of Globular Clusters around a Point in Sagittarius About 00 globular clusters are distributed in random directions around the center of our galaxy. 1 1/5/011 Structure

### The Milky Way & Galaxies

The Milky Way & Galaxies The Milky Way Appears as a milky band of light across the sky A small telescope reveals that it is composed of many stars (Galileo again!) Our knowledge of the Milky Way comes

### Our Universe: Creation, Galaxies, Stars and Celestial Objects

Our Universe: Creation, Galaxies, Stars and Celestial Objects Big Bang Theory Our universe began with one huge exploding atom that relapsed all the energy and matter that exists in the universe today.

### Chapter 11 The Formation of Stars

Chapter 11 The Formation of Stars A World of Dust The space between the stars is not completely empty, but filled with very dilute gas and dust, producing some of the most beautiful objects in the sky.