Lecture 2+3 - University of Texas Astronomy Home Page
... The Local Group, Clusters of Galaxies Superclusters, voids and filaments -- Distances: From the infinitesimal to the grandest scales -- Timescales : From the earliest epochs to the present day ...
... The Local Group, Clusters of Galaxies Superclusters, voids and filaments -- Distances: From the infinitesimal to the grandest scales -- Timescales : From the earliest epochs to the present day ...
Stars with mass less than 0.5 solar masses
... finishes. As a conseguence, the nuclear fusion finishes too, and so the star starts to contract under the pressure of its own mass. Then, the destiny of the star depends on its mass: ...
... finishes. As a conseguence, the nuclear fusion finishes too, and so the star starts to contract under the pressure of its own mass. Then, the destiny of the star depends on its mass: ...
20.1 Notes
... own gravity and rebounds with a shock wave that violently blows the stars outer layers from the core. This huge, bright explosion is called a Type II _________________________. If the core that remains after a supernova has a mass of 1.4 – 3 solar masses it becomes a _______________ star, a very den ...
... own gravity and rebounds with a shock wave that violently blows the stars outer layers from the core. This huge, bright explosion is called a Type II _________________________. If the core that remains after a supernova has a mass of 1.4 – 3 solar masses it becomes a _______________ star, a very den ...
Historical Overview of the Universe
... galaxies obtain their luminosity from nuclear fusion processes, thereby breeding heavy elements that become released via mass loss of red giants or in supernova explosions of the massive stars or binary systems. Numerous collisions among the first stellar systems trigger further star-formation proce ...
... galaxies obtain their luminosity from nuclear fusion processes, thereby breeding heavy elements that become released via mass loss of red giants or in supernova explosions of the massive stars or binary systems. Numerous collisions among the first stellar systems trigger further star-formation proce ...
Star Properties and Stellar Evolution
... different distances be compared? Use their brightness if they were all an equal distance from Earth = 32 ly. Absolute Magnitude ...
... different distances be compared? Use their brightness if they were all an equal distance from Earth = 32 ly. Absolute Magnitude ...
How Big Is Big
... more massive that the Sun, so it is _________ dense. If Antares were in our Solar System it would reach out to the orbit of ________! Red __________ and Red Supergiant stars are cooler than our Sun because they have ___________ in size and cooled down. One day our Sun will also become a Red Giant bu ...
... more massive that the Sun, so it is _________ dense. If Antares were in our Solar System it would reach out to the orbit of ________! Red __________ and Red Supergiant stars are cooler than our Sun because they have ___________ in size and cooled down. One day our Sun will also become a Red Giant bu ...
History Test Review Answers - School District of La Crosse
... 11.The__EGYPTIAN____________culture based their planting of the crops on the rising of the star Sirius, because the Nile would flood about this time. 12. ___HELIOCENTRIC__________model suggest the earth is the center of the solar system 13. The problem with ptolemy's model is he used imaginary ___C ...
... 11.The__EGYPTIAN____________culture based their planting of the crops on the rising of the star Sirius, because the Nile would flood about this time. 12. ___HELIOCENTRIC__________model suggest the earth is the center of the solar system 13. The problem with ptolemy's model is he used imaginary ___C ...
Topic E: Astrophysics E1 Introduction to the Universe.
... Defined by making a triangle between the Earth, the Sun and a distant object. If the angle at the distant object is 1 arcsec then it would be 1 parsec away. (more later) E.1.2 - Distinguish between a stellar cluster and a constellation E.1.4 - Compare the relative distances between stars within a ...
... Defined by making a triangle between the Earth, the Sun and a distant object. If the angle at the distant object is 1 arcsec then it would be 1 parsec away. (more later) E.1.2 - Distinguish between a stellar cluster and a constellation E.1.4 - Compare the relative distances between stars within a ...
Document
... • If you know how luminous a star REALLY is and how bright it looks from Earth, you can determine how far away it must be to look that faint. • For any star in the sky, we KNOW: ...
... • If you know how luminous a star REALLY is and how bright it looks from Earth, you can determine how far away it must be to look that faint. • For any star in the sky, we KNOW: ...
24-2 Characteristics of Stars
... • Light year – distance that light travels in one year (9.5 million million km) ...
... • Light year – distance that light travels in one year (9.5 million million km) ...
18.1 NOTES How are stars formed? Objective: Describe how stars
... A star is a big ball of gases that gives off heat and light. The Sun is only one of billions of stars that make up are galaxy, and there are billions of galaxies. Most stars appear to be white in color. However, there are blue, white, yellow, orange, and red stars. The color of a star determines how ...
... A star is a big ball of gases that gives off heat and light. The Sun is only one of billions of stars that make up are galaxy, and there are billions of galaxies. Most stars appear to be white in color. However, there are blue, white, yellow, orange, and red stars. The color of a star determines how ...
Stellar evolution, II
... As the hydrogen in the core of a star is transformed into helium, the matter in the core becomes degenerate. In a low density gas many possible energy levels of the electrons are open, but as the gas become denser all the lower energy levels are filled. The Pauli exclusion principle states that eac ...
... As the hydrogen in the core of a star is transformed into helium, the matter in the core becomes degenerate. In a low density gas many possible energy levels of the electrons are open, but as the gas become denser all the lower energy levels are filled. The Pauli exclusion principle states that eac ...
Hertzsprung Russell diagram
... This type of diagram is known as a Hertzsprung-Russell diagram. Since the original diagram was produced other quantities, the surface temperature and the luminosity compared with the Sun, have been added to give a version like that shown here. It is a very useful way to display the properties of a s ...
... This type of diagram is known as a Hertzsprung-Russell diagram. Since the original diagram was produced other quantities, the surface temperature and the luminosity compared with the Sun, have been added to give a version like that shown here. It is a very useful way to display the properties of a s ...
Scale of Apparent Magnitudes of Celestial Objects
... the second century BCE. Hipparchus is believed by many to be the greatest of the ancient astronomers. The original scale of apparent magnitude gave the brightest stars visible to the unaided eye a magnitude of 1 (first magnitude stars) and the faintest stars a 6. Each level was twice as bright (or h ...
... the second century BCE. Hipparchus is believed by many to be the greatest of the ancient astronomers. The original scale of apparent magnitude gave the brightest stars visible to the unaided eye a magnitude of 1 (first magnitude stars) and the faintest stars a 6. Each level was twice as bright (or h ...
Life and Evolution of a Massive Star
... – Degeneracy pressure prevents core from contracting enough ...
... – Degeneracy pressure prevents core from contracting enough ...
Document
... 22. Massive stars cannot generate energy through iron fusion because a. iron fusion requires very high density. b. stars contain very little iron. c. no star can get hot enough for iron fusion. d. iron is the most tightly bound of all nuclei. e. massive stars supernova before they create an iron cor ...
... 22. Massive stars cannot generate energy through iron fusion because a. iron fusion requires very high density. b. stars contain very little iron. c. no star can get hot enough for iron fusion. d. iron is the most tightly bound of all nuclei. e. massive stars supernova before they create an iron cor ...
Habitibility of Earth, in our Solar System, and Beyond
... restricted habitable zones, and more variable planetary environments. Imagine our solar system with a small star in place of Jupiter! ...
... restricted habitable zones, and more variable planetary environments. Imagine our solar system with a small star in place of Jupiter! ...
E5 stellar processes and stellar evolution (HL only)
... • Core contracts under its own weight • It stops when electrons have to be forced into the same quantum state. This is not allowed so this “electron degeneracy pressure” stops the star collapsing further • The outer layers are released to form a planetary nebula • The resultant White dwarf has no en ...
... • Core contracts under its own weight • It stops when electrons have to be forced into the same quantum state. This is not allowed so this “electron degeneracy pressure” stops the star collapsing further • The outer layers are released to form a planetary nebula • The resultant White dwarf has no en ...
lecture23
... All stars in a cluster are of about the same age. Clusters therefore are natural laboratory in which mass, rather than age, of stars is only significant variable. ...
... All stars in a cluster are of about the same age. Clusters therefore are natural laboratory in which mass, rather than age, of stars is only significant variable. ...
Review Quiz No. 22
... is located as distances of less than 100 pc from us. is located in galaxies other than the Milky Way. does not belong to a particular galaxy at all. ...
... is located as distances of less than 100 pc from us. is located in galaxies other than the Milky Way. does not belong to a particular galaxy at all. ...
Chapter 28.3 Topic questions
... 10. On the H-R diagram what are the stars called that have luminosity greater than red giant stars and their diameters are how much larger than the sun’s? 11. Red Super Giant stars have surface temperatures that are cooler than our earth, so why do they have greater luminosity than the sun? 12. The ...
... 10. On the H-R diagram what are the stars called that have luminosity greater than red giant stars and their diameters are how much larger than the sun’s? 11. Red Super Giant stars have surface temperatures that are cooler than our earth, so why do they have greater luminosity than the sun? 12. The ...
Concise pioneers of astronomy
... Isaac Newton was an English scientist and mathematician who lived between 16421727. He had one of the most brilliant minds the world has ever known. Legend has it that seeing an apple fall gave Newton the idea that gravity, the force that keeps us bound to the Earth, also controls the motion of plan ...
... Isaac Newton was an English scientist and mathematician who lived between 16421727. He had one of the most brilliant minds the world has ever known. Legend has it that seeing an apple fall gave Newton the idea that gravity, the force that keeps us bound to the Earth, also controls the motion of plan ...