# Mass-Luminosity and Stellar Lifetimes WS

Size: px
Start display at page:

Transcription

1 Name Mass-Luminosity and Stellar Lifetimes WS The graph shows the Mass-Luminosity Relationship for main sequence stars. Use it to answer questions ) A star with a mass of 0.5 solar masses would be how luminous? 2) A star with 10 solar masses would be how luminous? 3) What mass would a star have to have to be 10 times more luminous than the sun. Show your calculations for the following questions. 4) How luminous would a star be that has a mass of 15 solar masses? 5) How long would the star in question 4 live? 6) How luminous would a star be that has a mass of 0.25 solar masses? 7) How long would the star in question 6 live? 8) Explain why stars that are more massive than the sun have lifetimes that are shorter than the sun s lifetime, although they have more fuel to consume than the sun does. (2 pts)

2 Key to Mass-Luminosity and Stellar Lifetimes WS 1) about 0.09 L sun (determined graphically) 2) about 9 x 10 3 or 1 x 10 4 (9000 to 10,000) L sun (determined graphically) 3) about 1.9 to 2.0 M sun (determined graphically) 4) (15M sun / 1M sun ) 4 = 50,625 L sun 5) (1 / 15 3 ) x (1 x years) = about 2.96 million years (3 million years) 6) (0.25M sun / 1M sun ) 2.3 = L sun Pretty faint! 7) (1 / ) x (1 x years) = about 60 billion years 8) A star that is more massive than our sun does have more H fuel to fuse to He, but it would use it up at a rate that is proportional to its mass to the 4 th power faster than our sun. A star of 3 solar masses has 3 times more H fuel available, but uses it up at a rate of 3 4 or 81 times faster than our sun consumes H, and therefore lives a shorter time.

3 Name Stellar Properties WS (A general review of the information in starlight) 1) At 4 light years distance, the brightness of a star is ¼ as much as it is at light years distance. 2) The larger (more positive) the magnitude of a star, the ( brighter / dimmer ) it is. 3) Star distances can be accurately measured by parallax out to a distance of only light years. 4) A star with m = 8.4 and M = -3.9 is how far away in parsecs? Show your calculation. 5) Differences in spectra from one star to another are caused by differences in the stars : luminosity magnitude temperature distance 6) Betelgeuse is a star: red dwarf blue supergiant red main sequence red supergiant 7) Rigel is a star: white dwarf blue supergiant blue main sequence red supergiant 8) Our sun is what spectral class? 9) Is a G star ( hotter / cooler ) than an F star? 10) The hottest stars have almost no dark absorption lines from H in their spectra because most of their hydrogen: a) is ionized b) has been used up c) is metallic 11) A star like our sun shows strong absorption lines from this metallic element: ( Fe / Ca / U ) 12) On the HR diagram, the hottest stars are in the half of the diagram. ( top / bottom / left / right ) 13) On the HR diagram, a star near the top right would be: ( small & hot / small & cool / large & hot / large & cool ) 14) A star in the previous would be called a star. 15) Most of the stars closest to our sun are stars. 16) Stars that are more massive than our sun will have ( a longer / a shorter / the same ) life expectancy. 17) If a star has a small parallax, it means that the star is: very distant very close not very bright very small in size 18) What is the name for the apparent motion of a star against the distant background that is actually due to the motion of the star through space? 19) Orange stars have this spectral class ( B / M / K / F ) 20) A star with a mass 3.5 times our sun s mass would have a life expectancy of how many years. Show your calculation. 21) The vertical axis of the HR diagram has units of ( temperature or color / luminosity or brightness / distance ). 22) On the HR diagram, stars with small masses would be found in the half of the diagram. ( top / bottom / left / right ) 23) A star with a mass 3 times the sun s mass would be how many times brighter than the sun: ( 3 / 9 / 27 / 81 ) 24) A small red dwarf star with a mass of 0.15 solar masses would (show your calculations) a) have what luminosity compared to the sun? b) have what lifetime compared to the sun?

4 25) Sirius is about 20 times brighter than the sun. a) Sirius ( is more massive / is less massive / has the same mass ) as/than our sun. b) Sirius is ( hotter / cooler / about the same temperature ) as/than our sun. c) Sirius will live for a ( shorter time / longer time / similar time ) as/than our sun. d) Sirius is burning its fuel ( more slowly / about the same rate / faster ) as/than our sun. 26) Astronomers believe that only stars with spectral classes similar to our sun s could have planets on which life may have evolved. Give an explanation of why hotter stars are not expected to have life on their planets, even if they could have planets at the proper distances (so that the total amount of sunlight was right for life.)

5 Key to Stellar Properties WS (A general review of Ch. 14) 1) 2 LY 2) dimmer 3) 300 light years. 4) 10^[(8.4-(-3.9)+5)/5] = 10^[(17.3)/5] = 10^3.46 = 2884 pc. 5) temperature 6) red supergiant 7) blue supergiant blue main sequence (both these are correct!) 8) G2 9) cooler 10) a) is ionized 11) Ca 12) left 13) large & cool 14) red supergiant 15) main sequence or red dwarf 16) a shorter 17) very distant 18) Proper motion 19) K 20) (1 / ) x 10,000,000,000 = 233,000,000 years 21) luminosity or brightness 22) bottom 23) 81 24) a) = times the sun s brightness. b) (1 / ) x 10 billion = 118,000,000,000 years 25) a) more massive b) hotter c) shorter time d) faster 26) Hotter stars just don t live long enough for complex life to evolve.

### Review Chapter 10. 2) A parsec is slightly more than 200,000 AU. 2)

Review Chapter 10 TRUE/FALSE. Write 'T' if the statement is true and 'F' if the statement is false. 1) A parsec is about 3.3 light-years. 1) 2) A parsec is slightly more than 200,000 AU. 2) 3) The nearest

### Chapter 8: The Family of Stars

Chapter 8: The Family of Stars We already know how to determine a star s surface temperature chemical composition motion Next, we will learn how we can determine its distance luminosity radius mass Measuring

### Chapter 15: Surveying the Stars

Chapter 15 Lecture Chapter 15: Surveying the Stars Surveying the Stars 15.1 Properties of Stars Our goals for learning: How do we measure stellar luminosities? How do we measure stellar temperatures? How

### The Cosmic Perspective. Surveying the Properties of Stars. Surveying the Stars. How do we measure stellar luminosities?

Surveying the Stars Chapter 15 Lecture The Cosmic Perspective 15.1 Properties of Stars Our goals for learning: How do we measure stellar luminosities? How do we measure stellar temperatures? How do we

### Chapter 15 Surveying the Stars

Chapter 15 Surveying the Stars 15.1 Properties of Stars Our goals for learning How do we measure stellar luminosities? How do we measure stellar temperatures? How do we measure stellar masses? How do we

### Chapter 15 Surveying the Stars Properties of Stars

Chapter 15 Surveying the Stars 15.1 Properties of Stars Our goals for learning: How do we measure stellar luminosities? How do we measure stellar temperatures? How do we measure stellar masses? Luminosity:

### What tool do astronomers use to understand the evolution of stars?

What tool do astronomers use to understand the evolution of stars? Groups indicate types of stars or stages in their evolution. What is plotted? How does an individual star move around the diagram? What

### Magnitudes. How Powerful Are the Stars? Luminosities of Different Stars

How Powerful Are the Stars? Some stars are more powerful than others Power is energy output per. (Example: 00 Watts = 00 joules per second) Astronomers measure the power, or brightness of stars in ways:

### Chapter 15 Surveying the Stars Pearson Education, Inc.

Chapter 15 Surveying the Stars 15.1 Properties of Stars Our goals for learning: How do we measure stellar luminosities? How do we measure stellar temperatures? How do we measure stellar masses? 1. How

### Daily Science 04/04/2017

Daily Science 04/04/2017 Which statement best describes the difference between type A stars and type B stars as shown in the diagram? a. Type A stars burn for a shorter amount of time than type B stars.

### Parallax: Measuring the distance to Stars

Measuring the Stars Parallax: Measuring the distance to Stars Use Earth s orbit as baseline Parallactic angle = 1/2 angular shift Distance from the Sun required for a star to have a parallactic angle of

### Chapter 8: The Family of Stars

Chapter 8: The Family of Stars Motivation We already know how to determine a star s surface temperature chemical composition surface density In this chapter, we will learn how we can determine its distance

### A star is at a distance of 1.3 parsecs, what is its parallax?

Stars Spectral lines from stars Binaries and the masses of stars Classifying stars: HR diagram Luminosity, radius, and temperature Vogt-Russell theorem Main sequence Evolution on the HR diagram A star

### Stages of the Sun's life:

Stellar Evolution Stages of the Sun's life: 1) initial collapse from interstellar gas (5 million yrs) 2) onset of nuclear reactions to start of main sequence phase (30 million yrs) 3) main sequence (10

### Lecture Outlines. Chapter 17. Astronomy Today 8th Edition Chaisson/McMillan Pearson Education, Inc.

Lecture Outlines Chapter 17 Astronomy Today 8th Edition Chaisson/McMillan Chapter 17 Measuring the Stars Units of Chapter 17 17.1 The Solar Neighborhood 17.2 Luminosity and Apparent Brightness 17.3 Stellar

### Lecture 26 The Hertzsprung- Russell Diagram January 13b, 2014

1 Lecture 26 The Hertzsprung- Russell Diagram January 13b, 2014 2 Hertzsprung-Russell Diagram Hertzsprung and Russell found a correlation between luminosity and spectral type (temperature) 10000 Hot, bright

### GALAXIES AND STARS. 2. Which star has a higher luminosity and a lower temperature than the Sun? A Rigel B Barnard s Star C Alpha Centauri D Aldebaran

GALAXIES AND STARS 1. Compared with our Sun, the star Betelgeuse is A smaller, hotter, and less luminous B smaller, cooler, and more luminous C larger, hotter, and less luminous D larger, cooler, and more

### ASTR Look over Chapter 15. Good things to Know. Triangulation

ASTR 1020 Look over Chapter 15 Good things to Know Triangulation Parallax Parsecs Absolute Visual Magnitude Distance Modulus Luminosity Balmer Lines Spectral Classes Hertzsprung-Russell (HR) diagram Main

### λ = 650 nm = c = m s 1 f =? c = fλ f = c λ = ( m s 1 ) ( m) = = Hz T = 1 f 4.

Chapter 13 Stars Section 13.1 Astronomical measurements Worked example: Try yourself 13.1.1 CALCULATING THE FREQUENCY AND PERIOD OF LIGHT The speed of light in a vacuum is approximately 3.0 10 8 m s 1.

### Chapter 10 Measuring the Stars

Chapter 10 Measuring the Stars Some of the topics included in this chapter Stellar parallax Distance to the stars Stellar motion Luminosity and apparent brightness of stars The magnitude scale Stellar

### Lines of Hydrogen. Most prominent lines in many astronomical objects: Balmer lines of hydrogen

The Family of Stars Lines of Hydrogen Most prominent lines in many astronomical objects: Balmer lines of hydrogen The Balmer Thermometer Balmer line strength is sensitive to temperature: Most hydrogen

### Chapter 15 Surveying the Stars. Properties of Stars. Parallax and Distance. Distances Luminosities Temperatures Radii Masses

hapter 15 Surveying the Stars Properties of Stars istances Luminosities s Radii Masses istance Use radar in Solar System, but stars are so far we use parallax: apparent shift of a nearby object against

### 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 210 Spring 2017: Quiz 5 Question Packet 1. can: 2. An electron moving between energy levels

Permitted energy levels Astronomy 210 Spring 2017: Quiz 5 Question Packet 1 1. An electron in energy level 1 2 can: (A) only emit a photon. (B) only absorb a photon. (C) either emit, or absorb a photon.

### 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

### Modern Astronomy Review #1

Modern Astronomy Review #1 1. The red-shift of light from distant galaxies provides evidence that the universe is (1) shrinking, only (3) shrinking and expanding in a cyclic pattern (2) expanding, only

### a. Star A c. The two stars are the same distance b. Star B d. Not enough information

Name: Astro 102 S17 Test 1 Multiple Choice Identify the choice that best completes the statement or answers the question. 1. Your test is Version A. Please fill in the circle for A for this question on

### 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

### ASTRONOMY 1 EXAM 3 a Name

ASTRONOMY 1 EXAM 3 a Name Identify Terms - Matching (20 @ 1 point each = 20 pts.) Multiple Choice (25 @ 2 points each = 50 pts.) Essays (choose 3 of 4 @ 10 points each = 30 pt 1.Luminosity D 8.White dwarf

### Stars: Stars and their Properties

Stars: Stars and their Properties Astronomy 110 Class 10 WHEN I heard the learn d astronomer; When the proofs, the figures, were ranged in columns before me; When I was shown the charts and the diagrams,

### Guiding Questions. Measuring Stars

Measuring Stars Guiding Questions 1. How far away are the stars? 2. What is meant by a first-magnitude or second magnitude star? 3. Why are some stars red and others blue? 4. What are the stars made of?

### Masses are much harder than distance, luminosity, or temperature. Binary Stars to the Rescue!! AST 101 Introduction to Astronomy: Stars & Galaxies

Last Two Classes Measuring the Stars AST 101 Introduction to Astronomy: Stars & Galaxies 1. Measuring distances 2. Measuring stellar luminosities 3. Measuring temperatures Next 4. Measuring masses Masses

### My God, it s full of stars! AST 248

My God, it s full of stars! AST 248 N * The number of stars in the Galaxy N = N * f s f p n h f l f i f c L/T The Galaxy M31, the Andromeda Galaxy 2 million light years from Earth The Shape of the Galaxy

### EVOLUTION OF STARS HERTZSPRUNG-RUSSELL DIAGRAM

VISUAL PHYSICS ONLINE EVOLUTION OF STARS HERTZSPRUNG-RUSSELL DIAGRAM The total power radiated by a star is called its intrinsic luminosity L (luminosity). The apparent brightness (apparent luminosity)

### 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

### The Sun (chapter 14) some of this is review from quiz 3, but you should

Astro20 / Harpell Topics for Quiz 4 The quiz will have 20 multiple choice questions; several "fill in the blanks" about five short essay questions that may require sketches.. If you can answer everything

### Instructions. Students will underline the portions of the PowerPoint that are underlined.

STARS Instructions Students will underline the portions of the PowerPoint that are underlined. Nuclear Furnace 1. A star is like a gigantic nuclear furnace. 2. The nuclear reactions inside convert hydrogen

### 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

### Lecture 10: The Hertzsprung-Russell Diagram Reading: Sections

Lecture 10: The Hertzsprung-Russell Diagram Reading: Sections 19.7-19.8 Key Ideas The Hertzsprung-Russell (H-R) Diagram Plot of Luminosity vs. Temperature for stars Features: Main Sequence Giant & Supergiant

### ASTR-1020: Astronomy II Course Lecture Notes Section III

ASTR-1020: Astronomy II Course Lecture Notes Section III Dr. Donald G. Luttermoser East Tennessee State University Edition 4.0 Abstract These class notes are designed for use of the instructor and students

### Astronomy 1 Fall 2016

Astronomy 1 Fall 2016 Announcement: Tonight s observing session with Stephanie Ho has been CANCELLED. She has rescheduled it for 8-9pm on Thursday Nov. 3 rd. Hopefully the clouds will part by then. Lecture

### They developed a graph, called the H-R diagram, that relates the temperature of a star to its absolute magnitude.

Ejnar Hertzsprung and Henry Russell noticed that stars with higher temperatures and large sizes also have brighter absolute magnitudes the actual amount of light given off by a star. (also referred to

### Announcements. Lecture 11 Properties of Stars. App Bright = L / 4!d 2

Announcements Quiz#3 today at the end of 60min lecture. Homework#3 will be handed out on Thursday. Due October 14 (next Thursday) Review of Mid-term exam will be handed out next Tuesday. Mid-term exam

### The H-R Diagram. Image credit: NOAO

The H-R Diagram Image credit: NOAO Luminosity, Temperature, Radius Recall: apparent magnitude, absolute magnitude, and distance are related. We now have a method for finding the luminosity and a method

### Fusion in first few minutes after Big Bang form lightest elements

Fusion in first few minutes after Big Bang form lightest elements Stars build the rest of the elements up to Iron (Fe) through fusion The rest of the elements beyond Iron (Fe) are produced in the dying

### Stellar Evolution. The lives of low-mass stars. And the lives of massive stars

Stellar Evolution The lives of low-mass stars And the lives of massive stars The Structure of the Sun Let s review: The Sun is held together by what force? The inward force is balanced by what other force?

### 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

### Test #2 results. Grades posted in UNM Learn. Along with current grade in the class

Test #2 results Grades posted in UNM Learn D C B A Along with current grade in the class F Clicker Question: If the Earth had no Moon then what would happen to the tides? A: The tides would not be as strong

### Chapter 28 Stars and Their Characteristics

Chapter 28 Stars and Their Characteristics Origin of the Universe Big Bang Theory about 10-20 bya all matter in the universe existed in a hot dense state about the size of an atom (tiny). That matter sort

### 5. A particular star has an angle of parallax of 0.2 arcsecond. What is the distance to this star? A) 50 pc B) 2 pc C) 5 pc D) 0.

Name: Date: 1. How far away is the nearest star beyond the Sun, in parsecs? A) between 1 and 2 pc B) about 12 pc C) about 4 pc D) between 1/2 and 1 pc 2. Parallax of a nearby star is used to estimate its

### Organizing the Family of Stars:

Organizing the Family of Stars: We know: Stars have different temperatures, different luminosities, and different sizes. To bring some order into that zoo of different types of stars: organize them in

### HOMEWORK - Chapter 17 The Stars

Astronomy 20 HOMEWORK - Chapter 7 The Stars Use a calculator whenever necessary. For full credit, always show your work and explain how you got your answer in full, complete sentences on a separate sheet

### Chapter 15 Surveying the Stars. Agenda

hapter 15 Surveying the Stars genda nnounce: Test in 2.5 weeks Masteringastronomy.com issues Relativity review Review our sun h. 15 Surveying the Stars Lab Special vs. General Relativity pplies only to

### Each star is born with a specific mass. This mass is the main factor in determining the star s brightness, temperature, expected lifetime, type of

Each star is born with a specific mass. This mass is the main factor in determining the star s brightness, temperature, expected lifetime, type of death, and spectra. Stars are classified according to

### Characteristics of Stars

Characteristics of Stars This section explains how astronomers measure distances to stars. It also describes how stars are classified. Use Target Reading Skills As you read about stars, stop and write

### Directions: For numbers 1-30 please choose the letter that best fits the description.

Directions: For numbers 1-30 please choose the letter that best fits the description. 1. The main force responsible for the formation of the universe is: a. Gravity b. Frictional force c. Magnetic force

### Book page cgrahamphysics.com Stellar Spectra

Book page 650-652 Stellar Spectra Emission and absorption Spectra The black lines of the absorption spectrum match up with the bright lines of the emission spectrum Spectra unique to each element Emission

### Measuring Radial & Tangential Velocity. Radial velocity measurement. Tangential velocity measurement. Measure the star s Doppler shift

17. The Nature of the Stars Parallax reveals stellar distance Stellar distance reveals luminosity Luminosity reveals total energy production The stellar magnitude scale Surface temperature determines stellar

### Chapter 15 Lecture. The Cosmic Perspective Seventh Edition. Surveying the Stars Pearson Education, Inc.

Chapter 15 Lecture The Cosmic Perspective Seventh Edition Surveying the Stars 15.1 Properties of Stars Our goals for learning: How do we measure stellar luminosities? How do we measure stellar temperatures?

### Family of stars. Fred Sarazin Physics Department, Colorado School of Mines. PHGN324: Family of stars

Family of stars Reminder: the stellar magnitude scale In the 1900 s, the magnitude scale was defined as follows: a difference of 5 in magnitude corresponds to a change of a factor 100 in brightness. Dm

### Pr P ope p rti t es s of o f St S a t rs

Properties of Stars Distances Parallax ( Triangulation ): - observe object from two separate points - use orbit of the Earth (1 AU) - measure angular shift of object - angle depends on distance to object

### Astronomical Measurements: Brightness-Luminosity-Distance-Radius- Temperature-Mass. Dr. Ugur GUVEN

Astronomical Measurements: Brightness-Luminosity-Distance-Radius- Temperature-Mass Dr. Ugur GUVEN Space Science Distance Definitions One Astronomical Unit (AU), is the distance from the Sun to the Earth.

### Measuring the Properties of Stars (ch. 17) [Material in smaller font on this page will not be present on the exam]

Measuring the Properties of Stars (ch. 17) [Material in smaller font on this page will not be present on the exam] Although we can be certain that other stars are as complex as the Sun, we will try to

### MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.

Homework Ch 7, 8, 9 Name MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Our most detailed knowledge of Uranus and Neptune comes from 1) A) the

### The Hertzsprung-Russell Diagram

The Hertzsprung-Russell Diagram Name: Date: 1 Introduction As you may have learned in class, the Hertzsprung-Russell Diagram, or the HR diagram, is one of the most important tools used by astronomers:

### Selected Questions from Minute Papers. Outline - March 2, Stellar Properties. Stellar Properties Recap. Stellar properties recap

Black Holes: Selected Questions from Minute Papers Will all the material in the Milky Way eventually be sucked into the BH at the center? Does the star that gives up mass to a BH eventually get pulled

### Types of Stars and the HR diagram

Types of Stars and the HR diagram Full window version (looks a little nicer). Click button to get back to small framed version with content indexes. This material (and images) is copyrighted! See

### Homework 2 AST 301, Sections and 46850, Spring NAME Student EID Score: on last page. Due Tuesday, March 1, 2016

Homework 2 AST 301, Sections 46845 and 46850, Spring 2016 NAME Student EID Score: on last page Due Tuesday, March 1, 2016 Questions A C should help you to understand the properties of light. Show your

### Chapter 11 Surveying the Stars

Chapter 11 Surveying the Stars Luminosity Luminosity: Rate of energy emitted by star every second. Apparent brightness (flux): Amount of energy passing through every second per unit area. Luninosity =

### Measuring Radial & Tangential Velocity. Radial velocity measurement. Tangential velocity measurement. Measure the star s Doppler shift

17. The Nature of the Stars Parallax reveals stellar distance Stellar distance reveals luminosity Luminosity reveals total energy production The stellar magnitude scale Surface temperature determines stellar

### Properties of Stars & H-R Diagram

Properties of Stars & H-R Diagram What is a star? A cloud of gas, mainly hydrogen and helium The core is so hot/dense that nuclear fusion can occur. The fusion converts light nuclei (elements) into heavier

### Astro Fall 2012 Lecture 8. T. Howard

Astro 101 003 Fall 2012 Lecture 8 T. Howard Measuring the Stars How big are stars? How far away? How luminous? How hot? How old & how much longer to live? Chemical composition? How are they moving? Are

### Low-mass Stellar Evolution

Low-mass Stellar Evolution The lives of low-mass stars And the lives of massive stars The Structure of the Sun Let s review: The Sun is held together by? The inward force is balanced by? Thinking about

### NSCI 314 LIFE IN THE COSMOS

NSCI 314 LIFE IN THE COSMOS 2 BASIC ASTRONOMY, AND STARS AND THEIR EVOLUTION Dr. Karen Kolehmainen Department of Physics CSUSB COURSE WEBPAGE: http://physics.csusb.edu/~karen MOTIONS IN THE SOLAR SYSTEM

### Position 1 Position 2 6 after position 1 Distance between positions 1 and 2 is the Bigger = bigger parallax (Ɵ)

STARS CHAPTER 10.1 the solar neighborhood The distances to the nearest stars can be measured using Parallax => the shift of an object relative to some distant background as the observer s point of view

### Fusion in first few minutes after Big Bang form lightest elements

Fusion in first few minutes after Big Bang form lightest elements Stars build the rest of the elements up to Iron (Fe) through fusion The rest of the elements beyond Iron (Fe) are produced in the dying

### Astronomy Exam 3 - Sun and Stars

Astronomy Exam 3 - Sun and Stars Study online at quizlet.com/_4zgp6 1. `what are the smallest group of stars in the H-R diagram 2. A star has a parallax of 0.05". what is the distance from the earth? white

### 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?

### Astronomical Study: A Multi-Perspective Approach

Astronomical Study: A Multi-Perspective Approach Overview of Stars Motion Distances Physical Properties Spectral Properties Magnitudes Luminosity class Spectral trends Binary stars and getting masses Stellar

### Stars: some basic characteristics

Stars: some basic characteristics Stars! How bright are they? How massive are they? What are the different types? How long do they live? How hot are they? Stellar brightness and luminosity The apparent

### Astro 1050 Mon. Apr. 3, 2017

Astro 1050 Mon. Apr. 3, 017 Today: Chapter 15, Surveying the Stars Reading in Bennett: For Monday: Ch. 15 Surveying the Stars Reminders: HW CH. 14, 14 due next monday. 1 Chapter 1: Properties of Stars

### Astronomy 113. Dr. Joseph E. Pesce, Ph.D. Dr. Joseph E. Pesce, Ph.D.

Astronomy 113 Dr. Joseph E. Pesce, Ph.D. The Nature of Stars 8-2 Parallax For nearby stars - measure distances with parallax July 1 AU d p A A A January ³ d = 1/p (arcsec) [pc] ³ 1pc when p=1arcsec; 1pc=206,265AU=3

### 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

### Exam #2 Review Sheet. Part #1 Clicker Questions

Exam #2 Review Sheet Part #1 Clicker Questions 1) The energy of a photon emitted by thermonuclear processes in the core of the Sun takes thousands or even millions of years to emerge from the surface because

### Last time: looked at proton-proton chain to convert Hydrogen into Helium, releases energy.

Last time: looked at proton-proton chain to convert Hydrogen into Helium, releases energy. Last time: looked at proton-proton chain to convert Hydrogen into Helium, releases energy. Fusion rate ~ Temperature

### Characterizing Stars

Characterizing Stars The stars Every star you see in the sky is a large hot ball of gas like our star the Sun. Each one possibly making up a solar system with planets and debris orbiting around them. Stellar

### Agenda for Ast 309N, Sep. 27. Measuring Masses from Binary Stars

Agenda for Ast 309N, Sep. 27 Quiz 3 The role of stellar mass Ages of star clusters Exam 1, Thurs. Oct. 4 Study guide out on 9/28 Next topic: brown dwarfs and extrasolar planets 1 This image of the central

### Exploratorium Teacher Institute page 1 Linda S. Shore

Exploratorium Teacher Institute page 1 Growing Up A Star This activity helps students understand and interpret the Hertzsprung Russell (HR) diagram a graphical representation of how stars evolve that is

### How do we measure properties of a star? Today. Some Clicker Questions - #1. Some Clicker Questions - #1

Today Announcements: HW#8 due Friday 4/9 at 8:00 am. The size of the Universe (It s expanding!) The Big Bang Video on the Big Bang NOTE: I will take several questions on exam 3 and the final from the videos

### Astronomy 122 Outline

Astronomy 122 Outline This Class (Lecture 12): Stars Next Class: The Nature of Stars Homework #5 is posted. Nightlabs have started! Stellar properties Parallax (distance) Colors Spectral Classes Music:

### The Distances and Ages of Star Clusters

Name: Partner(s): Lab #7 The Distances and Ages of Star Clusters 0.1 Due July 14th Very few stars are born isolated. Instead, most stars form in small groups, known as clusters. The stars in a cluster

### The Life Cycle of Stars. : Is the current theory of how our Solar System formed.

Life Cycle of a Star Video (5 min) http://www.youtube.com/watch?v=pm9cqdlqi0a The Life Cycle of Stars Solar Nebula Theory : Is the current theory of how our Solar System formed. This theory states that

### CONTENT EXPECTATIONS

THE SUN & THE STARS CONTENT EXPECTATIONS STARS What are stars? Are they all the same? What makes them different? What is our nearest star? THE SUN Why is it important? provides heat and light that we need

### Temperature, Blackbodies & Basic Spectral Characteristics.

Temperature, Blackbodies & Basic Spectral Characteristics. Things that have one primary temperature but also exhibit a range of temperatures are known in physics as blackbodies. They radiate energy thermally.

### Stars, Galaxies & the Universe Announcements. Stars, Galaxies & the Universe Lecture Outline. HW#7 due Friday by 5 pm! (available Tuesday)

Stars, Galaxies & the Universe Announcements HW#7 due Friday by 5 pm! (available Tuesday) Midterm Grades (points) posted today in ICON Exam #2 next week (Wednesday) Review sheet and study guide posted

### ASTR 1120 General Astronomy: Stars & Galaxies

ASTR 1120 General Astronomy: Stars & Galaxies HOMEWORK #3 due NEXT TUE, 09/29, by 5pm Fiske planetarium: The Birth of Stars by Prof. John Bally - TH 09/24-FRI 09/25, 7:30pm Astronomer s s Toolbox: What

### LAB: Star Classification

Name: LAB: Star Classification INTRODUCTION: Like most scientists, astronomers like to categorize the Universe around them, and stars are no exception. Here s how astronomers classify stars into different

### The Distance Modulus. Absolute Magnitude. Chapter 9. Family of the Stars

Foundations of Astronomy 13e Seeds Phys1403 Introductory Astronomy Instructor: Dr. Goderya Chapter 9 Family of the Stars Cengage Learning 016 Topics for Today s Class 1. Recap: Intrinsic Brightness a)