THE HR DIAGRAM
... the type of stars in the cluster and the distance or age of the cluster. When examining a general HR diagram, notice that the stars are clumped into several groups. The broad line of stars extending from the upper left-hand corner to the lower right is called the main sequence. Most stars on a gener ...
... the type of stars in the cluster and the distance or age of the cluster. When examining a general HR diagram, notice that the stars are clumped into several groups. The broad line of stars extending from the upper left-hand corner to the lower right is called the main sequence. Most stars on a gener ...
Interstellar Cloud
... A protostar is the center of the disc formed in the center of the interstellar gas cloud. Hotter than the gas it condensed, but cooler than a star. Further collapse occurs when the protostar reaches seven million Kelvin and nuclear reactions begin in the core. ...
... A protostar is the center of the disc formed in the center of the interstellar gas cloud. Hotter than the gas it condensed, but cooler than a star. Further collapse occurs when the protostar reaches seven million Kelvin and nuclear reactions begin in the core. ...
H-R Diagram Student
... The Hertzsprung-Russell diagram is actually a graph that illustrates the relationship that exists between the average surface temperature of stars and their______________ ______________, which is how bright stars appear to be if they were all the same distance away. Rather than speak of the brightne ...
... The Hertzsprung-Russell diagram is actually a graph that illustrates the relationship that exists between the average surface temperature of stars and their______________ ______________, which is how bright stars appear to be if they were all the same distance away. Rather than speak of the brightne ...
Stellar Evolution
... • Gravity pulls a nebula’s dust and gas into a denser cloud • As a nebula heats up, it contracts • A contracting cloud of dust with enough mass to form a star ...
... • Gravity pulls a nebula’s dust and gas into a denser cloud • As a nebula heats up, it contracts • A contracting cloud of dust with enough mass to form a star ...
Part 2 Answer Key
... Star Clusters are multiple star systems bound together by the force of gravity. Star Clusters can be divided into two main groups. One group is called Globular Clusters. They contain many stars and gravity holds them tightly together. They swarm just outside the galaxy and form a halo or bulge. We k ...
... Star Clusters are multiple star systems bound together by the force of gravity. Star Clusters can be divided into two main groups. One group is called Globular Clusters. They contain many stars and gravity holds them tightly together. They swarm just outside the galaxy and form a halo or bulge. We k ...
Stellar Interiors
... However, you should always write out the “X10”, don’t write “EE” in what you hand in “There are 3.1536 X 107 seconds in one year.” ...
... However, you should always write out the “X10”, don’t write “EE” in what you hand in “There are 3.1536 X 107 seconds in one year.” ...
Study Notes for Chapter 30: Stars, Galaxies, and the Universe
... 1. A galaxy is made of stars, dust, and gas bound together by gravity. 2. A large, bright star whose hot core has used most of its hydrogen is a nova. 3. A light-year is the distance light travels in a year. 4. A small, hot, extremely dense core left after a star collapses is a white dwarf. 5. A sta ...
... 1. A galaxy is made of stars, dust, and gas bound together by gravity. 2. A large, bright star whose hot core has used most of its hydrogen is a nova. 3. A light-year is the distance light travels in a year. 4. A small, hot, extremely dense core left after a star collapses is a white dwarf. 5. A sta ...
main sequence star
... • Begins when almost all of the gases are used up by nuclear fusion and the star does not have enough energy to continue nuclear fusion. • The core of the star becomes unstable. • The star expands and changes temperature and luminosity (brightness). ...
... • Begins when almost all of the gases are used up by nuclear fusion and the star does not have enough energy to continue nuclear fusion. • The core of the star becomes unstable. • The star expands and changes temperature and luminosity (brightness). ...
–1– Order of Magnitude Astrophysics
... The H-R Diagram Once reactions occur at the hot central region of the star, its structure changes significantly. If the transport of this energy to the outer regions is through photon diffusion, then the opacity matter will play a vital role in determining the stellar structure. In particular, opaci ...
... The H-R Diagram Once reactions occur at the hot central region of the star, its structure changes significantly. If the transport of this energy to the outer regions is through photon diffusion, then the opacity matter will play a vital role in determining the stellar structure. In particular, opaci ...
Hertzsprung-Russell Diagram Astronomy Project Purpose: To
... sun. Example: Betelgeuse is 38000 LSUN, and emits 1.4 x 1031 watts 3.) With the provided formula, determine the star’s radius, and find some way of comparing it to other objects in the solar system. Example: The radius of Betelgeuse is 380,000,000 km, which could fit the entire orbit of the inner pl ...
... sun. Example: Betelgeuse is 38000 LSUN, and emits 1.4 x 1031 watts 3.) With the provided formula, determine the star’s radius, and find some way of comparing it to other objects in the solar system. Example: The radius of Betelgeuse is 380,000,000 km, which could fit the entire orbit of the inner pl ...
Mr - White Plains Public Schools
... There is a relationship between the temperatures of stars and how bright they are (luminosity). In general, the hotter a star the brighter. This is not always true though. For example, Polaris is the same temperature as our Sun, but is around 4000X brighter. This difference is due to the mass and si ...
... There is a relationship between the temperatures of stars and how bright they are (luminosity). In general, the hotter a star the brighter. This is not always true though. For example, Polaris is the same temperature as our Sun, but is around 4000X brighter. This difference is due to the mass and si ...
Study Notes for Chapter 30:
... A star moving away from the Earth has a spectrum that is shifted toward ______. ...
... A star moving away from the Earth has a spectrum that is shifted toward ______. ...
Study Notes for Chapter 30:
... A star moving away from the Earth has a spectrum that is shifted toward ______. ...
... A star moving away from the Earth has a spectrum that is shifted toward ______. ...
Ay123 Fall 2011 STELLAR STRUCTURE AND EVOLUTION Problem Set 5
... (a) Show that the sound speed close to the surface is given by c2 = (γ − 1) g z where z = R − r << R is the distance from the surface. (b) For a chosen horizontal wavelength ky (see HKT p410) find the associated spherical harmonic l in terms of R and, for a given frequency ω, the maximum distance zm ...
... (a) Show that the sound speed close to the surface is given by c2 = (γ − 1) g z where z = R − r << R is the distance from the surface. (b) For a chosen horizontal wavelength ky (see HKT p410) find the associated spherical harmonic l in terms of R and, for a given frequency ω, the maximum distance zm ...
Page R63 - ClassZone
... plotted according to brightness and surface temperature. Most stars fall within a diagonal band called the main sequence. In the mainsequence stage of a star’s life cycle, brightness is closely related to surface temperature. Red giant and red supergiant stars appear above the main sequence on the d ...
... plotted according to brightness and surface temperature. Most stars fall within a diagonal band called the main sequence. In the mainsequence stage of a star’s life cycle, brightness is closely related to surface temperature. Red giant and red supergiant stars appear above the main sequence on the d ...
The Hertzsprung – Russell Diagram
... Very bright, red in color, very large, cool in temperature Brightness of stars are due to their enormous size ...
... Very bright, red in color, very large, cool in temperature Brightness of stars are due to their enormous size ...
answers - Salem State University
... 9. When the pressure is low, a gas absorption line will be narrower than when the pressure is larger. In instellar medium (ISM) where there is not sufficient gravity to force the materials of the ISM to contract, the pressure will be lower than in a star or on most planets. 10. There is larger nucle ...
... 9. When the pressure is low, a gas absorption line will be narrower than when the pressure is larger. In instellar medium (ISM) where there is not sufficient gravity to force the materials of the ISM to contract, the pressure will be lower than in a star or on most planets. 10. There is larger nucle ...
Document
... How is it possible for white dwarf stars to have lower luminosity than the sun even though the sun is cooler than white dwarfs? ___________________________________________________________________ ___________________________________________________________________ ____________________________________ ...
... How is it possible for white dwarf stars to have lower luminosity than the sun even though the sun is cooler than white dwarfs? ___________________________________________________________________ ___________________________________________________________________ ____________________________________ ...
PPT
... stars So what? It shows stars of different ages and in different stages, all at the same time. It is a great tool to check your understanding of the star life cycle. ...
... stars So what? It shows stars of different ages and in different stages, all at the same time. It is a great tool to check your understanding of the star life cycle. ...
Unit 10 H-R Diagram Worksheet
... 2. Most stars spend the bulk of their “lives” with a Luminosity and Temperature that places them in the MAIN SEQUENCE region of the graph. 3. Stars form from clouds of space dust and gas (mostly hydrogen with some helium) called Nebulae. Gravity will start to pull in the dust and gas so it begins to ...
... 2. Most stars spend the bulk of their “lives” with a Luminosity and Temperature that places them in the MAIN SEQUENCE region of the graph. 3. Stars form from clouds of space dust and gas (mostly hydrogen with some helium) called Nebulae. Gravity will start to pull in the dust and gas so it begins to ...
MASS – LUMINOSITY RELATION FOR MASSIVE STARS
... Near the stellar surface we have Mr ≈ M and Lr ≈ L, and adopting κ ≈ κe = const, we may integrate equation (s2.3) to obtain ...
... Near the stellar surface we have Mr ≈ M and Lr ≈ L, and adopting κ ≈ κe = const, we may integrate equation (s2.3) to obtain ...
Slide 1
... The material that makes up the Sun was once part of 1) the Big Bang. 2) another star. 3) a molecular cloud. 4) all of the above. ...
... The material that makes up the Sun was once part of 1) the Big Bang. 2) another star. 3) a molecular cloud. 4) all of the above. ...
H-R Diagram Notes
... • NEGATIVE absolute magnitude values are ____________________ than POSITIVE absolute magnitude values A star… • Starts off in the lower right hand corner in ___________________________ when it first becomes a star. • As it gets ______________ and _______________, it moves up the main sequence. • The ...
... • NEGATIVE absolute magnitude values are ____________________ than POSITIVE absolute magnitude values A star… • Starts off in the lower right hand corner in ___________________________ when it first becomes a star. • As it gets ______________ and _______________, it moves up the main sequence. • The ...