RMH_Stellar_Evolution_Ast2001_09_29_09
... Indirect: -- must know distance Luminosity – depends on surface area (size) and temperature (Stefan-Boltzman Law) Mass -- with luminosity + physics , mass – luminosity relation ...
... Indirect: -- must know distance Luminosity – depends on surface area (size) and temperature (Stefan-Boltzman Law) Mass -- with luminosity + physics , mass – luminosity relation ...
Final Exam: Chs 4-5, 12-17
... d. Less massive protostars reach the main sequence in a shorter time than more massive protostars. ____ 49. Electron degeneracy occurs when a. solar wind particles become trapped in the Earth's magnetic field. b. thermonuclear reactions halt the contraction of a protostar. c. magnetic fields inhibit ...
... d. Less massive protostars reach the main sequence in a shorter time than more massive protostars. ____ 49. Electron degeneracy occurs when a. solar wind particles become trapped in the Earth's magnetic field. b. thermonuclear reactions halt the contraction of a protostar. c. magnetic fields inhibit ...
Time From the Perspective of a Particle Physicist
... • end up with core of Iron nuclei plus 26 unbound “free” electrons for every Fe • electrons are “degenerate” as so close together provide most of the pressure resisting gravity • enormous stress. electrons “give way” leaves “hole” size of Earth in center of star ...
... • end up with core of Iron nuclei plus 26 unbound “free” electrons for every Fe • electrons are “degenerate” as so close together provide most of the pressure resisting gravity • enormous stress. electrons “give way” leaves “hole” size of Earth in center of star ...
monkeyball_lifecycleofastar
... not even light can escape a black hole. Some people think that a black hole can lead to another dimension or another universe, sounds cool right ? Well no its not cool because if you ever get caught in one you would be stretched out and you probably would die. ...
... not even light can escape a black hole. Some people think that a black hole can lead to another dimension or another universe, sounds cool right ? Well no its not cool because if you ever get caught in one you would be stretched out and you probably would die. ...
Death of Low Mass Stars 8 Solar Masses or less
... dead star having low luminosity, small size and very great density. These white dwarf stars are intensely hot ... but they are cooling. Their interior nuclear fires no longer burn, so they will continue to cool until they fade away. The white dwarfs are circled. ...
... dead star having low luminosity, small size and very great density. These white dwarf stars are intensely hot ... but they are cooling. Their interior nuclear fires no longer burn, so they will continue to cool until they fade away. The white dwarfs are circled. ...
Lecture 2
... The age of the Galaxy is currently estimated to be about 13.6 billion years, which is nearly as old as the Universe itself (Pasquini et al. 2004). The galactic disk has an estimated diameter of about 100,000 light-years. The distance from the Sun to the galactic center is estimated at about 27,700 l ...
... The age of the Galaxy is currently estimated to be about 13.6 billion years, which is nearly as old as the Universe itself (Pasquini et al. 2004). The galactic disk has an estimated diameter of about 100,000 light-years. The distance from the Sun to the galactic center is estimated at about 27,700 l ...
Stars
... it becomes a black hole and nothing can escape from it, not even light. • Black holes are not like giant vacuums. It has an event horizon, a region inside of which nothing can escape. Anything that crosses the event horizon will be sucked into it. ...
... it becomes a black hole and nothing can escape from it, not even light. • Black holes are not like giant vacuums. It has an event horizon, a region inside of which nothing can escape. Anything that crosses the event horizon will be sucked into it. ...
Calculating_Main_Sequence_Lifetimes_StudentGuide
... ‘short’ period the stellar temperature decreases without a great change of luminosity. The star burns Hydrogen in shell (red giants) through the CNO cycle: as its radius increases so its luminosity raises. Helium flash: the star begins to burn Helium maintaining the combustion of Hydrogen in shells. ...
... ‘short’ period the stellar temperature decreases without a great change of luminosity. The star burns Hydrogen in shell (red giants) through the CNO cycle: as its radius increases so its luminosity raises. Helium flash: the star begins to burn Helium maintaining the combustion of Hydrogen in shells. ...
Stars, Galaxies & Universe
... HR diagram shows temperature, brightness, color of stars and where the star is in its life cycle. Used to graph the surface temperature (x-axis) vs. brightness (yaxis) Hotter stars are on left side of graph; cooler stars on the right side of the graph Brighter stars on top of graph; dimmer stars on ...
... HR diagram shows temperature, brightness, color of stars and where the star is in its life cycle. Used to graph the surface temperature (x-axis) vs. brightness (yaxis) Hotter stars are on left side of graph; cooler stars on the right side of the graph Brighter stars on top of graph; dimmer stars on ...
The Sun
... Earth’s rotation is slowing down because of the tidal interaction between Earth and the Moon at a rate of 2 milliseconds/century. If this rate remains constant at the present value, how long will it take for one day on Earth to become 2 seconds longer than it is now: A: 1000 years B: 100,000 years C ...
... Earth’s rotation is slowing down because of the tidal interaction between Earth and the Moon at a rate of 2 milliseconds/century. If this rate remains constant at the present value, how long will it take for one day on Earth to become 2 seconds longer than it is now: A: 1000 years B: 100,000 years C ...
Stellar Evolution
... • When the hydrogen in the core is almost consumed the balance between gravity pulling in and pressure pushing out is disturbed. • The structure and appearance of the star changes dramatically. • What happens then, depends on the star’s mass. • Two cases: – Low-mass (< 8 x mass of Sun) – High-mass ( ...
... • When the hydrogen in the core is almost consumed the balance between gravity pulling in and pressure pushing out is disturbed. • The structure and appearance of the star changes dramatically. • What happens then, depends on the star’s mass. • Two cases: – Low-mass (< 8 x mass of Sun) – High-mass ( ...
(as Main Sequence Stars)?
... tenth as massive as our sun? A: 1 billion years = 109 years B: 10 billion years = 1010 years C: 100 billion years = 1011 years D: 1 trillion years = 1012 years ...
... tenth as massive as our sun? A: 1 billion years = 109 years B: 10 billion years = 1010 years C: 100 billion years = 1011 years D: 1 trillion years = 1012 years ...
1) The following questions refer to the HR diagram
... 22) What happens to the surface temperature and luminosity when a protostar radiatively contracts? A) Its surface temperature remains the same and its luminosity decreases. B) Its surface temperature and luminosity remain the same. C) Its surface temperature decreases and its luminosity increases. D ...
... 22) What happens to the surface temperature and luminosity when a protostar radiatively contracts? A) Its surface temperature remains the same and its luminosity decreases. B) Its surface temperature and luminosity remain the same. C) Its surface temperature decreases and its luminosity increases. D ...
A small mass difference between Hydrogen and Helium The
... E=mc2 c=speed of light You get a lot of bang for the buck: 6.3E+14 J/kg. This gives plenty of energy to power the Sun for 4.5 billion years plus ...
... E=mc2 c=speed of light You get a lot of bang for the buck: 6.3E+14 J/kg. This gives plenty of energy to power the Sun for 4.5 billion years plus ...
Sizing Up The Universe
... Small Magellanic Cloud. They were all at approximately the same distance, so their relative luminosity as a function of their period of variability could be determined. From 1923 to 1924 Edwin Hubble (1889–1953) observed the Andromeda galaxy (M31) with the 100-inch-diameter telescope on Mount Wilson ...
... Small Magellanic Cloud. They were all at approximately the same distance, so their relative luminosity as a function of their period of variability could be determined. From 1923 to 1924 Edwin Hubble (1889–1953) observed the Andromeda galaxy (M31) with the 100-inch-diameter telescope on Mount Wilson ...
The Milky Way Galaxy
... Galaxy contains old stars and little in the way of dust and gas. • The disk of the galaxy contains gas, dust, younger stars with more complex chemical compositions, and active regions of star formation like the Orion nebula. ...
... Galaxy contains old stars and little in the way of dust and gas. • The disk of the galaxy contains gas, dust, younger stars with more complex chemical compositions, and active regions of star formation like the Orion nebula. ...
In the Spring of 2007 two of us began planning a new course in
... d. mass e. chemical makeup 15. Current evidence about how the universe is changing tells us that a. We are near the center of the universe. b. Galaxies are expanding into empty space. c. Groups of galaxies appear to move away from each other d. Nearby galaxies are younger than distant galaxies. 16. ...
... d. mass e. chemical makeup 15. Current evidence about how the universe is changing tells us that a. We are near the center of the universe. b. Galaxies are expanding into empty space. c. Groups of galaxies appear to move away from each other d. Nearby galaxies are younger than distant galaxies. 16. ...
Where Do Chemical Elements Come From?
... force of gravity resulting from all of the matter above the core, and the core collapses under its own weight. ...
... force of gravity resulting from all of the matter above the core, and the core collapses under its own weight. ...
The Life Cycle of Stars
... Centauri. Based on its mass, will our sun be around for a while? Approximately how long before our sun consumes the inner planets of our solar system? Why would it do this? What forces (interactions) are happening to cause this? Realize that once our Sun starts to run out of hydrogen fuel and has ex ...
... Centauri. Based on its mass, will our sun be around for a while? Approximately how long before our sun consumes the inner planets of our solar system? Why would it do this? What forces (interactions) are happening to cause this? Realize that once our Sun starts to run out of hydrogen fuel and has ex ...
A1993KK54100001
... The New York conference was a fiasco, dominated by a report of startling new observations that turned out to be entirely false and by theoretical models of radially pulsating white dwarf stars. But I did not have to wait long for the confirmations of my theory. By October of that year, the Australia ...
... The New York conference was a fiasco, dominated by a report of startling new observations that turned out to be entirely false and by theoretical models of radially pulsating white dwarf stars. But I did not have to wait long for the confirmations of my theory. By October of that year, the Australia ...