Life of a Star. Pillars of Creation
|
|
- Clementine Lawrence
- 6 years ago
- Views:
Transcription
1 Life of a Star
2 Life of a Star Pillars of Creation
3 Life of a Star Pillars of Creation Stars form from massive clouds of gas that primarily consist of hydrogen.
4 Life of a Star Gravity causes gas to contract and increase in temperature. (Gravitational contraction)
5 Life of a Star This is known as a protostar. A protostar has not started nuclear fusion yet.
6 Life of a Star Eventually nuclear fusion begins in the core.
7 Life of a Star
8 Life of a Star Stars can be born with masses from.08m to 150M.
9 Life of a Star Stars that are only converting hydrogen to helium are called main sequence stars.
10 Life of a Star Hertzsprung-Russell diagram plots luminosity of a star versus its surface temperature. (HR diagram)
11 Life of a Star
12 Life of a Low Mass Star Our Sun is a low mass star.
13 Life of a Low Mass Star
14 Life of a Low Mass Star A low mass star will stay on the main sequence for about 10 billion years until it stops burning hydrogen in its core.
15 Life of a Low Mass Star The star will fill up its core with helium and stop nuclear fusion.
16 Life of a Low Mass Star Gravity will contract the star and cause the hydrogen around the helium core to start nuclear fusion.
17 Life of a Low Mass Star The nuclear fusion in the shell around the core will force the star to expand. (Red Giant)
18 Life of a Low Mass Star The star will stay like this for a few hundred million years.
19 Life of a Low Mass Star More helium is created and forced into the core, heating it up. Eventually helium will start nuclear fusion (helium flash).
20 Life of a Low Mass Star Helium to Carbon nuclear fusion. 3 helium nuclei are fused into 1 carbon which releases energy.
21 Life of a Low Mass Star The star stabilizes, shrinks back down, and becomes more yellow.
22 Life of a Low Mass Star The star will stay like this for 100 million years.
23 Life of a Low Mass Star Eventually the star will fill its core up with carbon and nuclear fusion in the core will stop.
24 Life of a Low Mass Star Gravity will contract the star and cause the helium around the carbon core to start nuclear fusion.
25 Life of a Low Mass Star The nuclear fusion in both shells around the core will force the star to expand even more than before. (Red Giant)
26 Life of a Low Mass Star The star will stay like this for 1 million years.
27 Life of a Low Mass Star Eventually nuclear fusion will stop all together and the outer layers of the star will be carried away by the solar wind.
28 Life of a Low Mass Star The outer layers float away and are called planetary nebula.
29 Life of a Low Mass Star planetary nebula the glowing cloud of gas ejected from a low-mass star at the end of its life.
30 Life of a Low Mass Star planetary nebula the glowing cloud of gas ejected from a low-mass star at the end of its life.
31 Life of a Low Mass Star planetary nebula the glowing cloud of gas ejected from a low-mass star at the end of its life.
32 Life of a Low Mass Star planetary nebula the glowing cloud of gas ejected from a low-mass star at the end of its life.
33 Life of a Low Mass Star planetary nebula the glowing cloud of gas ejected from a low-mass star at the end of its life.
34 Life of a Low Mass Star Only the small core of the star is left which shines from the left over heat. (White dwarf)
35 Life of a Low Mass Star White dwarf -- The hot, compact corpses of low-mass stars, typically with a mass similar to the Sun compressed to a volume the size of the Earth.
36 Life of a Low Mass Star White dwarf -- The hot, compact corpses of low-mass stars, typically with a mass similar to the Sun compressed to a volume the size of the Earth.
37 Life of a Low Mass Star
38 Life of a Low Mass Star
39 Life of a Low Mass Star Low mass star life cycle.
40 Life of a High Mass Star
41 Life of a High Mass Star A massive star will have a hotter core which will increase the nuclear fusion rate, thus a shorter life span.
42 Life of a High Mass Star A high mass star may live for only 10 to 100 million years.
43 Life of a High Mass Star High mass stars enter the main sequence in this area. While on the main sequence, stars fuse hydrogen to helium.
44 Life of a High Mass Star CNO Nuclear Fusion Cycle
45 Life of a High Mass Star CNO Nuclear Fusion Cycle
46 Life of a High Mass Star CNO Nuclear Fusion Cycle
47 Life of a High Mass Star CNO Nuclear Fusion Cycle
48 Life of a High Mass Star CNO Nuclear Fusion Cycle
49 Life of a High Mass Star CNO Nuclear Fusion Cycle
50 Life of a High Mass Star CNO Nuclear Fusion Cycle
51 Proton-proton Nuclear Fusion (Low mass stars) Life of a High Mass Star CNO Nuclear Fusion Cycle CNO Nuclear Fusion (High mass stars)
52 Proton-proton Nuclear Fusion (Low mass stars) Life of a High Mass Star CNO Nuclear Fusion Cycle CNO Nuclear Fusion (High mass stars)
53 Proton-proton Nuclear Fusion (Low mass stars) Life of a High Mass Star CNO Nuclear Fusion Cycle CNO Nuclear Fusion (High mass stars) Produces more energy
54 Life of a High Mass Star A high mass star will exhaust its hydrogen fuel and begin nuclear fusion in a shell around the core expanding into a Supergiant.
55 Life of a High Mass Star Eventually nuclear fusion will begin in the core, fusing helium to carbon, and the star will stabilize.
56 Life of a High Mass Star This process happens many times as the star begins nuclear fusion with heavier elements.
57 Life of a High Mass Star The star continues the fusion process until it reaches iron (Fe), which the star cannot fuse into heavier elements.
58 Life of a High Mass Star Fusion in the core stops, but the outer shells continue fusion, depositing more iron in the core.
59 Life of a High Mass Star The extreme pressure on the iron core pushes the core electrons into the protons, creating neutrons, shrinking the core.
60 Life of a High Mass Star Empty space is created around the tiny core. The outside layers rush towards the center of the star and collide. Theoretically, the collision in the core causes a massive explosion called a supernova.
61 Life of a High Mass Star Theoretically, the collision in the core causes a massive explosion called a supernova.
62 Life of a High Mass Star Supernova can be as bright as 10 billion Suns.
63 Life of a High Mass Star Supernova can be as bright as 10 billion Suns.
64 Life of a High Mass Star Supernova can be as bright as 10 billion Suns.
65 Life of a High Mass Star Either a neutron star or a black hole will be left behind.
66 Life of a High Mass Star Neutron star -- The compact corpse of a high-mass star left over after a supernova; typically 1M with a radius of a few kilometers.
67 Life of a High Mass Star Neutron star -- The compact corpse of a high-mass star left over after a supernova; typically 1M with a radius of a few kilometers. Earth White dwarf
68 Life of a High Mass Star Neutron star -- The compact corpse of a high-mass star left over after a supernova; typically 1M with a radius of a few kilometers.
69 Life of a High Mass Star If the star has enough mass, it will leave a black hole instead of a neutron star.
70 Life of a High Mass Star Black hole a region of spacetime from which gravity prevents anything, including light, from escaping.
71 Life of a High Mass Star Black hole a region of spacetime from which gravity prevents anything, including light, from escaping.
72 Life of a High Mass Star Black hole a region of spacetime from which gravity prevents anything, including light, from escaping.
73 Life of a High Mass Star How can we see black holes if no light can escape?
74 Life of a High Mass Star How can we see black holes if no light can escape?
75 Life of a High Mass Star How can we see black holes if no light can escape?
76 Life of a High Mass Star How can we see black holes if no light can escape?
77 Life of a High Mass Star
78 Life of a High Mass Star
79 Life of a Low Mass Star High-mass star life cycle.
80 Life of a Low Mass Star
81
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
More informationLife 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
More informationLIFE CYCLE OF A STAR
LIFE CYCLE OF A STAR First stage = Protostar PROTOSTAR Cloud of gas and dust many light-years across Gravity tries to pull the materials together Eventually, at the center of the ball of dust and gas,
More informationThey 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
More informationLow mass stars. Sequence Star Giant. Red. Planetary Nebula. White Dwarf. Interstellar Cloud. White Dwarf. Interstellar Cloud. Planetary Nebula.
Low mass stars Interstellar Cloud Main Sequence Star Red Giant Planetary Nebula White Dwarf Interstellar Cloud Main Sequence Star Red Giant Planetary Nebula White Dwarf Low mass stars Interstellar Cloud
More informationStellar Evolution Notes
Name: Block: Stellar Evolution Notes Stars mature, grow old and die. The more massive a star is, the shorter its life will be. Our Sun will live about 10 billion years. It is already 5 billion years old,
More informationLIFE CYCLE OF A STAR
LIFE CYCLE OF A STAR First stage = Protostar PROTOSTAR Cloud of gas and dust many light-years across Gravity tries to pull the materials together Eventually, at the center of the ball of dust and gas,
More informationTo infinity, and beyond!
stars The night sky is filled with stars that shine at different levels of brightness. The brightness of the stars we observe can be related to the size of the star or its distance from Earth. In order
More informationThe 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
More informationHigh Mass Stars. Dr Ken Rice. Discovering Astronomy G
High Mass Stars Dr Ken Rice High mass star formation High mass star formation is controversial! May form in the same way as low-mass stars Gravitational collapse in molecular clouds. May form via competitive
More informationIntroduction to Astronomy. Lecture 8: The Death of Stars White Dwarfs, Neutron Stars, and Black Holes
Introduction to Astronomy Lecture 8: The Death of Stars White Dwarfs, Neutron Stars, and Black Holes Continued from Last Week Lecture 7 Observing Stars Clusters of stars Some clouds start breaking into
More informationCh. 29 The Stars Stellar Evolution
Ch. 29 The Stars 29.3 Stellar Evolution Basic Structure of Stars Mass effects The more massive a star is, the greater the gravity pressing inward, and the hotter and more dense the star must be inside
More informationLife Cycle of a Star Worksheet
Life Cycle of a Star Worksheet 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 and dust in a nebula together.
More informationA Star Becomes a Star
A Star Becomes a Star October 28, 2002 1) Stellar lifetime 2) Red Giant 3) White Dwarf 4) Supernova 5) More massive stars Review Solar winds/sunspots Gases and Dust Molecular clouds Protostars/Birth of
More informationProtostars on the HR Diagram. Lifetimes of Stars. Lifetimes of Stars: Example. Pressure-Temperature Thermostat. Hydrostatic Equilibrium
Protostars on the HR Diagram Once a protostar is hot enough to start, it can blow away the surrounding gas Then it is visible: crosses the on the HR diagram The more the cloud, the it will form stars Lifetimes
More informationToday. Stars. Evolution of High Mass Stars. Nucleosynthesis. Supernovae - the explosive deaths of massive stars
Today Stars Evolution of High Mass Stars Nucleosynthesis Supernovae - the explosive deaths of massive stars 1 Another good job on exam! Class average was 71% Given the difficulty of the exam, this was
More informationChapters 12 and 13 Review: The Life Cycle and Death of Stars. How are stars born, and how do they die? 4/1/2009 Habbal Astro Lecture 27 1
Chapters 12 and 13 Review: The Life Cycle and Death of Stars How are stars born, and how do they die? 4/1/2009 Habbal Astro 110-01 Lecture 27 1 Stars are born in molecular clouds Clouds are very cold:
More informationInstructions. 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
More informationStars and their properties: (Chapters 11 and 12)
Stars and their properties: (Chapters 11 and 12) To classify stars we determine the following properties for stars: 1. Distance : Needed to determine how much energy stars produce and radiate away by using
More informationThe Formation of Stars
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. We are interested
More information1. What is the primary difference between the evolution of a low-mass star and that of a high-mass star?
FYI: The Lives of Stars E3:R6b 1. Read FYI: The Lives of Stars As you read use the spaces below to write down any information you find especially interesting. Also define the bold terms used in the text.
More informationExplain how the sun converts matter into energy in its core. Describe the three layers of the sun s atmosphere.
Chapter 29 and 30 Explain how the sun converts matter into energy in its core. Describe the three layers of the sun s atmosphere. Explain how sunspots are related to powerful magnetic fields on the sun.
More informationPost Activity/ Homework Questions: 1. Before a star forms A. Where do you think the gas and dust originally came from?
Critical Thinking Questions: (work on these with a partner) 1. During the formation of a Red Giant Star, the core of a star pushes the outer shell back only enough to make the star larger. However, during
More informationHow Do Stars Appear from Earth?
How Do Stars Appear from Earth? Magnitude: the brightness a star appears to have from Earth Apparent Magnitude depends on 2 things: (actual intrinsic brightness) The color of a star is related to its temperature:
More informationReview: HR Diagram. Label A, B, C respectively
Stellar Evolution Review: HR Diagram Label A, B, C respectively A C B a) A: White dwarfs, B: Giants, C: Main sequence b) A: Main sequence, B: Giants, C: White dwarfs c) A: Main sequence, B: White Dwarfs,
More informationGalaxies Galore. Types of Galaxies: Star Clusters. Spiral spinning wit arms Elliptical roundish Irregular no set pattern
Stars Studying Stars Astronomers use a spectroscope to study the movement of stars Blue shift towards earth Red shift away from earth Change in a wavelength moving toward or away from earth is the Doppler
More informationStars and Galaxies. Evolution of Stars
chapter 13 3 Stars and Galaxies section 3 Evolution of Stars Before You Read What makes one star different from another? Do you think the Sun is the same as other stars? Write your ideas on the lines below.
More informationBirth and Death of Stars. Birth of Stars. Gas and Dust Clouds. Astronomy 110 Class 11
Birth and Death of Stars Astronomy 110 Class 11 Birth of Stars Start in cloud of gas and dust Contraction and Fragmentation Gravitational collapse and heating Protostar and disk Main Sequence Star Gas
More informationLow-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
More information25.2 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,
More informationthe nature of the universe, galaxies, and stars can be determined by observations over time by using telescopes
the nature of the universe, galaxies, and stars can be determined by observations over time by using telescopes The spectral lines of stars tell us their approximate composition Remember last year in Physics?
More informationBirth & 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
More informationChapter 17 Lecture. The Cosmic Perspective Seventh Edition. Star Stuff Pearson Education, Inc.
Chapter 17 Lecture The Cosmic Perspective Seventh Edition Star Stuff Star Stuff 17.1 Lives in the Balance Our goals for learning: How does a star's mass affect nuclear fusion? How does a star's mass affect
More informationThe 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 informationLife and Death of a Star 2015
Life and Death of a Star 2015 Name Date 1. In the main-sequence, the core is slowly shrinking because A. the mass of the star is slowly increasing B. hydrogen fusing to helium makes the core more dense
More information17.3 Life as a High-Mass Star
17.3 Life as a High-Mass Star Our goals for learning: What are the life stages of a high-mass star? How do high-mass stars make the elements necessary for life? How does a high-mass star die? What are
More informationWhat is a star? A body of gases that gives off tremendous amounts of energy in the form of light & heat. What star is closest to the earth?
Stars What is a star? A body of gases that gives off tremendous amounts of energy in the form of light & heat. What star is closest to the earth? Answer: The SUN It s about 150,000,000 km from earth =
More informationA Star is born: The Sun. SNC1D7-Space
A Star is born: The Sun SNC1D7-Space Exploring the Sun Our Sun, a star, is the most important celestial object for life on Earth. The solar nebula theory is the current theory used to explain the formation
More informationL = 4 d 2 B p. 4. Which of the letters at right corresponds roughly to where one would find a red giant star on the Hertzsprung-Russell diagram?
Fall 2016 Astronomy - Test 3 Test form B Name Do not forget to write your name and fill in the bubbles with your student number, and fill in test form B on the answer sheet. Write your name above as well.
More informationL = 4 d 2 B p. 1. Which outer layer of the Sun has the highest temperature? A) Photosphere B) Corona C) Chromosphere D) Exosphere E) Thermosphere
Fall 2016 Astronomy - Test 3 Test form A Name Do not forget to write your name and fill in the bubbles with your student number, and fill in test form A on the answer sheet. Write your name above as well.
More information*Generally speaking, there are two main life cycles for stars. *The factor which determines the life cycle of the star is its mass.
Generally speaking, there are two main life cycles for stars. The factor which determines the life cycle of the star is its mass. 1 solar mass = size of our Sun Any star less than about three solar masses
More information10/17/2012. Stellar Evolution. Lecture 14. NGC 7635: The Bubble Nebula (APOD) Prelim Results. Mean = 75.7 Stdev = 14.7
1 6 11 16 21 26 31 36 41 46 51 56 61 66 71 76 81 86 91 96 10/17/2012 Stellar Evolution Lecture 14 NGC 7635: The Bubble Nebula (APOD) Prelim Results 9 8 7 6 5 4 3 2 1 0 Mean = 75.7 Stdev = 14.7 1 Energy
More informationChapter 12: The Life Cycle of Stars (contʼd) How are stars born, and how do they die? 4/9/09 Habbal Astro Lecture 25 1
Chapter 12: The Life Cycle of Stars (contʼd) How are stars born, and how do they die? 4/9/09 Habbal Astro 110-01 Lecture 25 1 12.3 Life as a High-Mass Star Learning Goals What are the life stages of a
More informationExam # 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 informationLecture 8: The Death of Stars White Dwarfs, Neutron Stars, and Black Holes
Lecture 8: The Death of Stars White Dwarfs, Neutron Stars, and Black Holes ! the time a star is fusing hydrogen into helium in its core! stars spend most of their time in this stage! main-sequence stars
More informationStars: Their Life and Afterlife
The 68 th Compton Lecture Series Stars: Their Life and Afterlife Lecture 3: The Life and Times of Low Mass Stars Brian Humensky, lecturer http://kicp.uchicago.edu/~humensky/comptonlectures.htm October
More information1 The Life Cycle of a Star
CHAPTER 1 The Life Cycle of a Star Describe the life cycle of various size stars. Rings of glowing gas encircling Supernova 1987A, about 179,000 light-years away in the Large Magellanic Cloud, one of the
More informationDecember 18, What do you know about the life of a star?
December 18, 2013 What do you know about the life of a star? Bellwork December 18, 2014 What determines the life cycle and life time of a star? Scale 4 3 2 1 0 I am a 3 and can apply the stages to the
More informationLifespan on the main sequence. Lecture 9: Post-main sequence evolution of stars. Evolution on the main sequence. Evolution after the main sequence
Lecture 9: Post-main sequence evolution of stars Lifetime on the main sequence Shell burning and the red giant phase Helium burning - the horizontal branch and the asymptotic giant branch The death of
More informationDaily Science 03/30/2017
Daily Science 03/30/2017 The atmospheres of different planets contain different gases. Which planet is most likely Earth? a. planet 1 b. planet 2 c. planet 3 d. planet 4 KeslerScience.com Can you name
More informationWhat You Should Know About Stars With Less Than 8 Solar Masses!
What You Should Know About Stars With Less Than 8 Solar Masses! 1.) That is, what basic characteristic makes a star a star? (fusion is happening in its core) 2.) How long will it take a small star to run
More informationStellar Evolution and the HertzsprungRussell Diagram 7/14/09. Astronomy 101
Stellar Evolution and the HertzsprungRussell Diagram 7/14/09 Astronomy 101 Astronomy Picture of the Day Astronomy 101 Outline for Today Astronomy Picture of the Day News Articles Business Return Lab 5
More informationChapter 12: The Lives of Stars. How do we know it s there? Three Kinds of Nebulae 11/7/11. 1) Emission Nebulae 2) Reflection Nebulae 3) Dark Nebulae
11/7/11 Chapter 12: The Lives of Stars Space is Not Empty The Constellation Orion The Orion Nebula This material between the stars is called the Interstellar Medium It is very diffuse and thin. In fact
More informationMissing words: mass hydrogen burning electrostatic repulsion. gravitationally hydrogen temperature protostar
Instructions Fill in the blanks of each frame using the list of missing words given. Cut out each frame and arrange them on your page in order, then stick them down. The first two frames are already in
More informationProtostars on the HR Diagram. Lifetimes of Stars. Lifetimes of Stars: Example. Pressure-Temperature Thermostat. Hydrostatic Equilibrium
Protostars on the HR Diagram Once a protostar is hot enough to start, it can blow away the surrounding gas Then it is visible: crosses the on the HR diagram The more the cloud, the it will form stars Lifetimes
More informationLecture 33: The Lives of Stars
Lecture 33 The Lives of Stars Astronomy 141 Winter 2012 This lecture concerns the life cycle of normal stars. Stars shine because they are hot, and need a source of energy to keep shining. Main Sequence
More informationSTARS AND GALAXIES STARS
STARS AND GALAXIES STARS enormous spheres of plasma formed from strong gravitational forces PLASMA the most energetic state of matter; responsible for the characteristic glow emitted by these heavenly
More informationNSCI 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
More informationAnnouncements. L! m 3.5 BRIGHT FAINT. Mass Luminosity Relation: Why? Homework#3 will be handed out at the end of this lecture.
Announcements BRIGHT Homework#3 will be handed out at the end of this lecture. Due October 14 (next Thursday) Review of Mid-term exam will be handed out Tuesday. Mid-term exam will be variants (if not
More informationLast 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
More informationThe Life and Death of Stars
The Life and Death of Stars What is a Star? A star is a sphere of plasma gas that fuses atomic nuclei in its core and so emits light The name star can also be tagged onto a body that is somewhere on the
More information10/26/ Star Birth. Chapter 13: Star Stuff. How do stars form? Star-Forming Clouds. Mass of a Star-Forming Cloud. Gravity Versus Pressure
10/26/16 Lecture Outline 13.1 Star Birth Chapter 13: Star Stuff How do stars form? Our goals for learning: How do stars form? How massive are newborn stars? Star-Forming Clouds Stars form in dark clouds
More informationStars. 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
More informationThe Life Cycles of Stars. Dr. Jim Lochner, NASA/GSFC
STARS I. Stellar Evolution The Life Cycles of Stars Dr. Jim Lochner, NASA/GSFC A. Nebula- cloud of gas and dust B. Protostar- spinning disk C. Main Sequence 1. When the protostar reaches 15 million C,
More informationASTRONOMY 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
More informationStars, 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
More informationAstronomy 1144 Exam 3 Review
Stars and Stellar Classification Astronomy 1144 Exam 3 Review Prof. Pradhan 1. What is a star s energy source, or how do stars shine? Stars shine by fusing light elements into heavier ones. During fusion,
More informationLec 9: Stellar Evolution and DeathBirth and. Why do stars leave main sequence? What conditions are required for elements. Text
1 Astr 102 Lec 9: Stellar Evolution and DeathBirth and Evolution Why do stars leave main sequence? What conditions are required for elements Text besides Hydrogen to fuse, and why? How do stars die: white
More informationA star is a massive sphere of gases with a core like a thermonuclear reactor. They are the most common celestial bodies in the universe are stars.
A star is a massive sphere of gases with a core like a thermonuclear reactor. They are the most common celestial bodies in the universe are stars. They radiate energy (electromagnetic radiation) from a
More informationThe Birth and Death of Stars
The Birth and Death of Stars 2013 Simulation Curriculum Teachers may make copies for their classes Part 1: Stellar Cradles With a small telescope the central region of M42 reveals a group of at least four
More informationPlanetary Nebulae White dwarfs
Life of a Low-Mass Star AST 101 Introduction to Astronomy: Stars & Galaxies Planetary Nebulae White dwarfs REVIEW END STATE: PLANETARY NEBULA + WHITE DWARF WHAS IS A WHITE DWARF? Exposed core of a low-mass
More informationStellar Evolution - Chapter 12 and 13. The Lives and Deaths of Stars White dwarfs, neutron stars and black holes
Stellar Evolution - Chapter 12 and 13 The Lives and Deaths of Stars White dwarfs, neutron stars and black holes During the early stages of a star formation the objects are called a protostars. The internal
More informationOutline - March 18, H-R Diagram Review. Protostar to Main Sequence Star. Midterm Exam #2 Tuesday, March 23
Midterm Exam #2 Tuesday, March 23 Outline - March 18, 2010 Closed book Will cover Lecture 8 (Special Relativity) through Lecture 14 (Star Formation) only If a topic is in the book, but was not covered
More informationAstro 21 first lecture. stars are born but also helps us study how. Density increases in the center of the star. The core does change from hydrogen to
Astro 21 first lecture The H-R H R Diagram helps us study how stars are born but also helps us study how they die. Stars spend most of their lives as main sequence stars. The core does change from hydrogen
More informationStars & Galaxies. Chapter 27 Modern Earth Science
Stars & Galaxies Chapter 27 Modern Earth Science Chapter 27, Section 1 27.1 Characteristics of Stars How do astronomers determine the composition and surface temperature of a star? Composition & Temperature
More informationAstronomy 1504 Section 002 Astronomy 1514 Section 10 Midterm 2, Version 1 October 19, 2012
Astronomy 1504 Section 002 Astronomy 1514 Section 10 Midterm 2, Version 1 October 19, 2012 Choose the answer that best completes the question. Read each problem carefully and read through all the answers.
More informationLife and Death of a Star. Chapters 20 and 21
Life and Death of a Star Chapters 20 and 21 90 % of a stars life Most stars spend most of their lives on the main sequence. A star like the Sun, for example, after spending a few tens of millions of years
More informationStellar Evolution: Outline
Stellar Evolution: Outline Interstellar Medium (dust) Hydrogen and Helium Small amounts of Carbon Dioxide (makes it easier to detect) Massive amounts of material between 100,000 and 10,000,000 solar masses
More informationThe Life Cycles of Stars. Modified from Information provided by: Dr. Jim Lochner, NASA/GSFC
The Life Cycles of Stars Modified from Information provided by: Dr. Jim Lochner, NASA/GSFC Twinkle, Twinkle, Little Star... What do you see? How I Wonder What You Are... Stars have: Different Colors -
More informationStars 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
More informationStellar Evolution. Stars are chemical factories The Earth and all life on the Earth are made of elements forged in stars
Lecture 11 Stellar Evolution Stars are chemical factories The Earth and all life on the Earth are made of elements forged in stars A Spiral Galaxy (Milky Way Type) 120,000 ly A few hundred billion stars
More informationCONTENT 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
More informationStars & Galaxies. Chapter 27, Section 1. Composition & Temperature. Chapter 27 Modern Earth Science Characteristics of Stars
Stars & Galaxies Chapter 27 Modern Earth Science Chapter 27, Section 1 27.1 Characteristics of Stars Composition & Temperature Scientists use the following tools to study stars Telescope Observation Spectral
More informationComparing a Supergiant to the Sun
The Lifetime of Stars Once a star has reached the main sequence stage of it life, it derives its energy from the fusion of hydrogen to helium Stars remain on the main sequence for a long time and most
More informationThe Evolution of Low Mass Stars
The Evolution of Low Mass Stars Key Ideas: Low Mass = M < 4 M sun Stages of Evolution of a Low Mass star: Main Sequence star star star Asymptotic Giant Branch star Planetary Nebula phase White Dwarf star
More informationThe Universe. is space and everything in it.
The Universe is space and everything in it. Galaxies A galaxy is a supercluster of stars, gas, and dust that are held together by gravity. There are three main types of galaxies: Irregular Elliptical Spiral
More informationWhy Do Stars Leave the Main Sequence? Running out of fuel
Star Deaths Why Do Stars Leave the Main Sequence? Running out of fuel Observing Stellar Evolution by studying Globular Cluster HR diagrams Plot stars in globular clusters in Hertzsprung-Russell diagram
More informationPHYS 1401: Descriptive Astronomy Notes: Chapter 12
CHAPTER 12: STELLAR EVOLUTION 12.1: LEAVING THE MAIN SEQUENCE Stars and the Scientific Method You cannot observe a single star from birth to death You can observe a lot of stars in a very short period
More informationPhys 100 Astronomy (Dr. Ilias Fernini) Review Questions for Chapter 9
Phys 0 Astronomy (Dr. Ilias Fernini) Review Questions for Chapter 9 MULTIPLE CHOICE 1. We know that giant stars are larger in diameter than the sun because * a. they are more luminous but have about the
More informationAstronomy 104: Stellar Astronomy
Astronomy 104: Stellar Astronomy Lecture 18: A High-Mass Star s Life and Death (a.k.a. - Things that go BOOM in the night) Spring Semester 2013 Dr. Matt Craig 1 1 Reading Today: Chapter 12.1 (Life and
More informationAge of M13: 14 billion years. Mass of stars leaving the main-sequence ~0.8 solar masses
Age of M13: 14 billion years. Mass of stars leaving the main-sequence ~0.8 solar masses Helium coreburning stars Giants Subgiants Main Sequence Here is a way to think about it. Outside of star Plenty of
More informationHeading for death. q q
Hubble Photos Credit: NASA, The Hubble Heritage Team (STScI/AURA) Heading for death. q q q q q q Leaving the main sequence End of the Sunlike star The helium core The Red-Giant Branch Helium Fusion Helium
More information17.1 Lives in the Balance. Our goals for learning: How does a star's mass affect nuclear fusion?
Stellar Evolution 17.1 Lives in the Balance Our goals for learning: How does a star's mass affect nuclear fusion? How does a star's mass affect nuclear fusion? Stellar Mass and Fusion The mass of a main-sequence
More informationStellar Astronomy Sample Questions for Exam 4
Stellar Astronomy Sample Questions for Exam 4 Chapter 15 1. Emission nebulas emit light because a) they absorb high energy radiation (mostly UV) from nearby bright hot stars and re-emit it in visible wavelengths.
More informationPre Main-Sequence Evolution
Stellar Astrophysics: Stellar Evolution Pre Main-Sequence Evolution The free-fall time scale is describing the collapse of the (spherical) cloud to a protostar 1/2 3 π t ff = 32 G ρ With the formation
More information8/30/2010. 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 informationStars. A star is a ball of burning gas. Mr. Fetch s Earth Science Classroom
Stars A star is a ball of burning gas. 1 Stars: The Hertzsrung-Russell diagram (HR) If we were to graph all of the stars in the sky, we would find a graph like this one. Comparing stars temperature to
More informationCh. 25 In-Class Notes: Beyond Our Solar System
Ch. 25 In-Class Notes: Beyond Our Solar System ES2a. The solar system is located in an outer edge of the disc-shaped Milky Way galaxy, which spans 100,000 light years. ES2b. Galaxies are made of billions
More informationChapter 14. Stellar Evolution I. The exact sequence of evolutionary stages also depends on the mass of a star.
Chapter 14 Stellar Evolution I I. Introduction Stars evolve in the sense that they pass through different stages of a stellar life cycle that is measured in billions of years. The longer the amount of
More informationProperties of Stars. Characteristics of Stars
Properties of Stars Characteristics of Stars A constellation is an apparent group of stars originally named for mythical characters. The sky contains 88 constellations. Star Color and Temperature Color
More information