The coolest White Dwarf— older than the age of the universe?
... steadily loses its outer gasses and ends its life as a ball of compact degenerate electron gas or a White Dwarf (WD). It may begin this stage with a very high temperature, say 50,000 K and it steadily cools over time following a well-known cooling rate. Eventually this object will cool so much that ...
... steadily loses its outer gasses and ends its life as a ball of compact degenerate electron gas or a White Dwarf (WD). It may begin this stage with a very high temperature, say 50,000 K and it steadily cools over time following a well-known cooling rate. Eventually this object will cool so much that ...
General Introduction 1. Luminosity, Flux and Magnitude The
... The evolution of the Sun is shown schematically in Fig. 7.3. The red giant phase occurs after the interior of the Sun is exhausted of hydrogen and helium burning initiates. The Sun is not massive enough to burn elements beyond He, so after shedding roughly half its mass in a violent wind leading to ...
... The evolution of the Sun is shown schematically in Fig. 7.3. The red giant phase occurs after the interior of the Sun is exhausted of hydrogen and helium burning initiates. The Sun is not massive enough to burn elements beyond He, so after shedding roughly half its mass in a violent wind leading to ...
STAAR Review – Week Ten
... 18. Around 1910, two astronomers named Hertzsprung and Russell discovered a relationship that the stars in the main sequence have in common. What is this relationship? a. Stars with greater magnitudes tend to have lower temperatures. b. Stars with greater masses tend to have lower temperatures. c. S ...
... 18. Around 1910, two astronomers named Hertzsprung and Russell discovered a relationship that the stars in the main sequence have in common. What is this relationship? a. Stars with greater magnitudes tend to have lower temperatures. b. Stars with greater masses tend to have lower temperatures. c. S ...
Star Formation/Llfe Cycle Notes
... d. Center of protostar gets dense enough and therefore hot enough (3000K+) to become luminous, however not visible due to exterior of gas and dust surrounding it. 3) Phophids- YSO’s starting to disk a. start to get charged particles 4) Early star- Does a stutter step with nuclear fusion which blows ...
... d. Center of protostar gets dense enough and therefore hot enough (3000K+) to become luminous, however not visible due to exterior of gas and dust surrounding it. 3) Phophids- YSO’s starting to disk a. start to get charged particles 4) Early star- Does a stutter step with nuclear fusion which blows ...
Ast 405, Pulsating Stars The following is based Chapter 14 of the
... • 12. Contracting gases heat up and expanding gases cool down according to the ideal gas law. This is what is to be expected during an adiabatic change. But pulsating stars generally are brightest when they are expanding through their equilbrium radius. This is the phase lag for classical Cepheids ...
... • 12. Contracting gases heat up and expanding gases cool down according to the ideal gas law. This is what is to be expected during an adiabatic change. But pulsating stars generally are brightest when they are expanding through their equilbrium radius. This is the phase lag for classical Cepheids ...
Word doc - UC-HiPACC - University of California, Santa Cruz
... gravitational force. If many stars form all at once—that is, if star formation efficiency is high—they will stay together as a gravitationally bound open cluster (like the Pleiades) or a globular cluster (like M13 in Hercules). For more than a decade, it has been known that any two stars that are me ...
... gravitational force. If many stars form all at once—that is, if star formation efficiency is high—they will stay together as a gravitationally bound open cluster (like the Pleiades) or a globular cluster (like M13 in Hercules). For more than a decade, it has been known that any two stars that are me ...
Achievement
... You may draw a labelled diagram (s) in the box provided to support your answer. Birth: The sun was born from a giant cloud of dust and gas in space. It formed due to gravity creating a proto-star. ...
... You may draw a labelled diagram (s) in the box provided to support your answer. Birth: The sun was born from a giant cloud of dust and gas in space. It formed due to gravity creating a proto-star. ...
What is a Star
... producing its own heat and light by nuclear reactions in the star's core. Stars vary in size, mass, brightness, temperature and colour. The smallest mass possible for a star is about 1/10 that of the Sun, while the brightest stars have masses more than 60 times that of the Sun. Stars are born from n ...
... producing its own heat and light by nuclear reactions in the star's core. Stars vary in size, mass, brightness, temperature and colour. The smallest mass possible for a star is about 1/10 that of the Sun, while the brightest stars have masses more than 60 times that of the Sun. Stars are born from n ...
Astronomy PPT
... Because of Earth’s rotation, the sun appears to move across the sky. Likewise, if you look at the night sky long enough, the stars also appear to move. All of the stars appear to rotate around Polaris, the North Star, which is almost directly above the Earth’s North Pole. Because of Earth’s rotation ...
... Because of Earth’s rotation, the sun appears to move across the sky. Likewise, if you look at the night sky long enough, the stars also appear to move. All of the stars appear to rotate around Polaris, the North Star, which is almost directly above the Earth’s North Pole. Because of Earth’s rotation ...
Test 2, Nov. 17, 2015 - Physics@Brock
... (d) [No comparison of their surface temperatures can be made.] 16. A photon can be absorbed by an atom only if the photon energy is equal to the energy difference of two atomic energy levels. (a) True. (b) False. 17. Star Betelgeuse in Orion is 120,000 times more luminous than the Sun, yet its surfa ...
... (d) [No comparison of their surface temperatures can be made.] 16. A photon can be absorbed by an atom only if the photon energy is equal to the energy difference of two atomic energy levels. (a) True. (b) False. 17. Star Betelgeuse in Orion is 120,000 times more luminous than the Sun, yet its surfa ...
The Hot-plate Model of a Star Model of Stars— 3 Oct
... hot plate produce more energy per second? (The same question applies to a star: What are two ways to make a star brighter or more luminous?) What can I do to make the same hot-plate at the same setting burn my hand and not burn my hand? ...
... hot plate produce more energy per second? (The same question applies to a star: What are two ways to make a star brighter or more luminous?) What can I do to make the same hot-plate at the same setting burn my hand and not burn my hand? ...
Properties of Stars: The H
... • There is a very interesting story of the chemical enrichment history of the Galaxy and Universe that goes with these `metal-poor’ stars that we will return to in a few weeks. For now will only note that the chemically deficient stars are the oldest stars in the Galaxy. So far the most chemically d ...
... • There is a very interesting story of the chemical enrichment history of the Galaxy and Universe that goes with these `metal-poor’ stars that we will return to in a few weeks. For now will only note that the chemically deficient stars are the oldest stars in the Galaxy. So far the most chemically d ...
MSci Astrophysics 210PHY412 - Queen's University Belfast
... Students will learn how to interpret observational characteristics of stars in terms of the underlying physical parameters You should gain an understanding of how stars of different mass evolve, and what end products are produced Students should learn what causes planetary nebulae and supernovae You ...
... Students will learn how to interpret observational characteristics of stars in terms of the underlying physical parameters You should gain an understanding of how stars of different mass evolve, and what end products are produced Students should learn what causes planetary nebulae and supernovae You ...
Lecture 2 - University of Chicago, Astronomy
... in the telescope, but stars did not; observed all four phases of the Venus (gibbous phases could not be explained by the Ptolemaic model); discovered four largest satellites of Jupiter; they are still called Galilean moons; this was another blow to the dying Ptolemaic system. Galileo resolved the Mi ...
... in the telescope, but stars did not; observed all four phases of the Venus (gibbous phases could not be explained by the Ptolemaic model); discovered four largest satellites of Jupiter; they are still called Galilean moons; this was another blow to the dying Ptolemaic system. Galileo resolved the Mi ...
The life of Stars
... • Period thus tells us luminosity, which then tells us the distance • Since Cepheids are brighter than RR Lyrae, they can be used to measure out to further ...
... • Period thus tells us luminosity, which then tells us the distance • Since Cepheids are brighter than RR Lyrae, they can be used to measure out to further ...
Main Sequence Star What is happening in the core? How does the
... Main Sequence Star What is happening in the core? How does the star support itself? ...
... Main Sequence Star What is happening in the core? How does the star support itself? ...
File history of astronomy
... • The sun is one star in 100 billion stars that make up our galaxy- The Milky Way • Our galaxy is one of billions of galaxies in the ...
... • The sun is one star in 100 billion stars that make up our galaxy- The Milky Way • Our galaxy is one of billions of galaxies in the ...
L1 Solar system
... •rocky composition, some with significant water content •a few 100’000 known. •total mass 1/30 of lunar mass (1 lunar mass ~1/81 ME): not a destroyed planet. •26 with diameters larger than 200 km. Largest: Ceres 900 km. •2.2 AU < a < 3.2 AU for 95%: between Mars and Jupiter •existence of families (g ...
... •rocky composition, some with significant water content •a few 100’000 known. •total mass 1/30 of lunar mass (1 lunar mass ~1/81 ME): not a destroyed planet. •26 with diameters larger than 200 km. Largest: Ceres 900 km. •2.2 AU < a < 3.2 AU for 95%: between Mars and Jupiter •existence of families (g ...
Integrative Studies 410 Our Place in the Universe
... • Q9: Estimate life expectancy from energy production rate and available fuel (mass) – Example: Star with 4L and 3M uses 4 times more mass for energy production, but has 3 times more mass, so it life time is a factor ¾=0.75 compared to the sun: 7.5 billion years ...
... • Q9: Estimate life expectancy from energy production rate and available fuel (mass) – Example: Star with 4L and 3M uses 4 times more mass for energy production, but has 3 times more mass, so it life time is a factor ¾=0.75 compared to the sun: 7.5 billion years ...
Unit 1
... • Photons have a difficult time moving through a star’s atmosphere • If the photon has the right energy, it will be absorbed by an atom and raise an electron to a higher energy level • Creates absorption spectra, a unique “fingerprint” for the star’s composition. The strength of this spectra is dete ...
... • Photons have a difficult time moving through a star’s atmosphere • If the photon has the right energy, it will be absorbed by an atom and raise an electron to a higher energy level • Creates absorption spectra, a unique “fingerprint” for the star’s composition. The strength of this spectra is dete ...
Star Sizes
... find this star is to follow the handle of the Big Dipper. The handle arc, and if you follow the arc of the handle the first bright star you see is Arcturus. Let’s compare our star to a few other well-known stars. ...
... find this star is to follow the handle of the Big Dipper. The handle arc, and if you follow the arc of the handle the first bright star you see is Arcturus. Let’s compare our star to a few other well-known stars. ...
