Properties of Stars in general
... • The end state of many stars similar to our Sun are white dwarfs which lie in the lower left of the diagram (hot - so at left, small - so faint ). • We will look at this in the next section of the ...
... • The end state of many stars similar to our Sun are white dwarfs which lie in the lower left of the diagram (hot - so at left, small - so faint ). • We will look at this in the next section of the ...
Indoor lab #1: The Hertzsprung-Russel Diagram and Selection Effects
... a) the average distance of all the stars in your table: b) the number of and average distance of the red giant stars (stars of type 1) c) the number of and average distance of the bluer main sequence stars (stars of type 2) d) the number of and average distance of the redder main sequence stars (sta ...
... a) the average distance of all the stars in your table: b) the number of and average distance of the red giant stars (stars of type 1) c) the number of and average distance of the bluer main sequence stars (stars of type 2) d) the number of and average distance of the redder main sequence stars (sta ...
Stellar Evolution Hertzsprung-Russell Diagram Hertzsprung
... · Hertzsprung & Russell noticed that the higher a star's temperature, the more energy it gave off per second (luminosity) · developed a graph to show the relationship · most stars fit in a diagonal band that runs from the upper left (hot, blue, bright stars) to the lower right (cool, red, dim stars) ...
... · Hertzsprung & Russell noticed that the higher a star's temperature, the more energy it gave off per second (luminosity) · developed a graph to show the relationship · most stars fit in a diagonal band that runs from the upper left (hot, blue, bright stars) to the lower right (cool, red, dim stars) ...
Life Cycles of Stars
... Why Black-Body Radiation is so Important • Color is directly related to temperature • Temperature is the only determinant of color • Energy per unit area is the same if temperature is the same – If two stars have the same color and distance, difference in brightness is due to difference in size – D ...
... Why Black-Body Radiation is so Important • Color is directly related to temperature • Temperature is the only determinant of color • Energy per unit area is the same if temperature is the same – If two stars have the same color and distance, difference in brightness is due to difference in size – D ...
Stellar Physics Lecture 1
... Examination of stellar spectra reveal absorption lines on the black body background ...
... Examination of stellar spectra reveal absorption lines on the black body background ...
Document
... _____ 7. A scientist can identify a star’s composition by looking at a. the star’s prism. b. the star’s continuous spectrum. c. the star’s absorption spectrum. d. the star’s color. _____ 8. The majority of stars in our galaxy are a. blue stars. b. white dwarfs. c.main-sequence stars. d. red giants. ...
... _____ 7. A scientist can identify a star’s composition by looking at a. the star’s prism. b. the star’s continuous spectrum. c. the star’s absorption spectrum. d. the star’s color. _____ 8. The majority of stars in our galaxy are a. blue stars. b. white dwarfs. c.main-sequence stars. d. red giants. ...
What are stars?
... ___________________________________________________________________ ___________________________________________________________________ ___________________________________________________________________ How do stars develop? In what ways do stars differ from one another? ___________________________ ...
... ___________________________________________________________________ ___________________________________________________________________ ___________________________________________________________________ How do stars develop? In what ways do stars differ from one another? ___________________________ ...
Chapter 8, Lesson 4, 2nd Packet, pdf
... ___________________________________________________________________ ___________________________________________________________________ ___________________________________________________________________ How do stars develop? In what ways do stars differ from one another? ___________________________ ...
... ___________________________________________________________________ ___________________________________________________________________ ___________________________________________________________________ How do stars develop? In what ways do stars differ from one another? ___________________________ ...
Note Taking Guide #2: Characteristics of Stars Welcome back! As
... A star’s apparent magnitude is how much light a star appears to give off when viewed from Earth. The closer a star is to Erath, the more light it appears to give off. Think of our sun versus Alpha Centauri; the sun appears to give off much more light, even though the two stars are actually very simi ...
... A star’s apparent magnitude is how much light a star appears to give off when viewed from Earth. The closer a star is to Erath, the more light it appears to give off. Think of our sun versus Alpha Centauri; the sun appears to give off much more light, even though the two stars are actually very simi ...
Galactic Address/Stars/Constellations
... • What colors do you notice? • Why are there different colors? • How does a candle look up close? Far away? ...
... • What colors do you notice? • Why are there different colors? • How does a candle look up close? Far away? ...
mass per nucleon
... molecular cloud to proto-star main sequence star (core Hydrogen burning) core Hydrogen exhausted (sub-giant) shell Hydrogen burning (red giant) core Helium burning (Helium Flash) shell Helium burning (double-shell burning red giant) planetary nebula white dwarf ...
... molecular cloud to proto-star main sequence star (core Hydrogen burning) core Hydrogen exhausted (sub-giant) shell Hydrogen burning (red giant) core Helium burning (Helium Flash) shell Helium burning (double-shell burning red giant) planetary nebula white dwarf ...
Unit 11 Vocabulary
... 3. protostar - a very young star that is still gathering mass from its parent molecular cloud. This is the earliest phase in the process of a star’s evolution. 4. main sequence star - stars that are fusing hydrogen atoms to form helium atoms in their cores. Most of the stars in the universe are main ...
... 3. protostar - a very young star that is still gathering mass from its parent molecular cloud. This is the earliest phase in the process of a star’s evolution. 4. main sequence star - stars that are fusing hydrogen atoms to form helium atoms in their cores. Most of the stars in the universe are main ...
Earth Science Unit Test Review
... 1. Describe composition of Sun. What type of star is it? How long does it take light from Sun to reach us? 2. Identify the features of the Sun on a diagram. Why do sunspots appear dark? 3. Desc ...
... 1. Describe composition of Sun. What type of star is it? How long does it take light from Sun to reach us? 2. Identify the features of the Sun on a diagram. Why do sunspots appear dark? 3. Desc ...
3. Stellar Formation and Evolution
... patches of nebulosity known as Herbig-Haro objects. • These jets, in combination with radiation from nearby massive stars, may help to drive away the surrounding cloud in which the star was formed. ...
... patches of nebulosity known as Herbig-Haro objects. • These jets, in combination with radiation from nearby massive stars, may help to drive away the surrounding cloud in which the star was formed. ...
Review Game
... protostar, main-sequence, red giant, white dwarf 80 times the mass of Jupiter when nuclear fusion begins in the core The rotation rate increases and results in a disk of material around a protostar. core, radiation zone, convection zone, photosphere, chromosphere, corona areas of the corona where ma ...
... protostar, main-sequence, red giant, white dwarf 80 times the mass of Jupiter when nuclear fusion begins in the core The rotation rate increases and results in a disk of material around a protostar. core, radiation zone, convection zone, photosphere, chromosphere, corona areas of the corona where ma ...
Study Guide for the 4TH Astronomy Exam
... Study Guide for the 4TH Astronomy Exam Stellar Evolution The successful student will be able to… 1. Star Formation a. Describe the physical characteristics of a giant molecular cloud b. Identify the source of heating (energy production) in protostars c. Explain why more low-mass K & M main sequence ...
... Study Guide for the 4TH Astronomy Exam Stellar Evolution The successful student will be able to… 1. Star Formation a. Describe the physical characteristics of a giant molecular cloud b. Identify the source of heating (energy production) in protostars c. Explain why more low-mass K & M main sequence ...
Chapter13
... T ~ 106 K Binary consisting of WD + MS or Red Giant star => WD accretes matter from the companion ...
... T ~ 106 K Binary consisting of WD + MS or Red Giant star => WD accretes matter from the companion ...
Life Cycle of a Star
... The color of a star is dependant on its temperature. Astronomers measure the temperature of each star by its outer most layer or its photosphere. O stars, which are the hottest of the seven categories, are blue in color. M stars, which are the coolest, are red. Within the range of this spectrum, the ...
... The color of a star is dependant on its temperature. Astronomers measure the temperature of each star by its outer most layer or its photosphere. O stars, which are the hottest of the seven categories, are blue in color. M stars, which are the coolest, are red. Within the range of this spectrum, the ...
ppt
... Therefore stars have an extremely large gravitational attraction that keeps their plasma held together. As gravity acts equally in all directions the plasma that forms the star is moulded into a sphere. But there must be some force keeping the star from collapsing in on itself. Because stars are so ...
... Therefore stars have an extremely large gravitational attraction that keeps their plasma held together. As gravity acts equally in all directions the plasma that forms the star is moulded into a sphere. But there must be some force keeping the star from collapsing in on itself. Because stars are so ...
Brighter than the average star?
... star? It is probably a result of over zealously applying the mediocrity principle. This is the philosophical idea that there is nothing special about our place in the Universe (“we live on an ordinary planet, orbiting an ordinary star in an ordinary galaxy…”) In general this a sensible notion, after ...
... star? It is probably a result of over zealously applying the mediocrity principle. This is the philosophical idea that there is nothing special about our place in the Universe (“we live on an ordinary planet, orbiting an ordinary star in an ordinary galaxy…”) In general this a sensible notion, after ...
Basic Observations of Stars
... temperature: red = cool; yellow = middling; blue = hot. (Objects at room temperature glow in the infrared!) Note that the distance is irrelevant! The colours will be unaffected by distance provided the intervening space ...
... temperature: red = cool; yellow = middling; blue = hot. (Objects at room temperature glow in the infrared!) Note that the distance is irrelevant! The colours will be unaffected by distance provided the intervening space ...
Classifying Stars (pages 753–754) Key Concept: Characteristics
... temperature. The coolest stars appear red. The hottest stars appear blue. ...
... temperature. The coolest stars appear red. The hottest stars appear blue. ...
Russell Diagram
... massive as the other. They are 2.0 AU apart and have an orbit period of 0.50 y. What is the mass of the smaller star in terms of solar masses? ...
... massive as the other. They are 2.0 AU apart and have an orbit period of 0.50 y. What is the mass of the smaller star in terms of solar masses? ...
The Solar System
... nuclear fusion in centre, becoming a star. • Associated with disks ( planetary systems), outflows and jets. • Disperse their cocoon to become visible. • Typically form in clusters, dominated by light from 1–2 brightest members. GENS4001 Astronomy ...
... nuclear fusion in centre, becoming a star. • Associated with disks ( planetary systems), outflows and jets. • Disperse their cocoon to become visible. • Typically form in clusters, dominated by light from 1–2 brightest members. GENS4001 Astronomy ...
Stellar classification
In astronomy, stellar classification is the classification of stars based on their spectral characteristics. Light from the star is analyzed by splitting it with a prism or diffraction grating into a spectrum exhibiting the rainbow of colors interspersed with absorption lines. Each line indicates an ion of a certain chemical element, with the line strength indicating the abundance of that ion. The relative abundance of the different ions varies with the temperature of the photosphere. The spectral class of a star is a short code summarizing the ionization state, giving an objective measure of the photosphere's temperature and density.Most stars are currently classified under the Morgan–Keenan (MK) system using the letters O, B, A, F, G, K, and M, a sequence from the hottest (O type) to the coolest (M type). Each letter class is then subdivided using a numeric digit with 0 being hottest and 9 being coolest (e.g. A8, A9, F0, F1 form a sequence from hotter to cooler). The sequence has been expanded with classes for other stars and star-like objects that do not fit in the classical system, such class D for white dwarfs and class C for carbon stars.In the MK system a luminosity class is added to the spectral class using Roman numerals. This is based on the width of certain absorption lines in the star's spectrum which vary with the density of the atmosphere and so distinguish giant stars from dwarfs. Luminosity class 0 or Ia+ stars for hypergiants, class I stars for supergiants, class II for bright giants, class III for regular giants, class IV for sub-giants, class V for main-sequence stars, class sd for sub-dwarfs, and class D for white dwarfs. The full spectral class for the Sun is then G2V, indicating a main-sequence star with a temperature around 5,800K.