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... only form of energy we can detect with our _____ other forms of energy that come from stars are: ...
... only form of energy we can detect with our _____ other forms of energy that come from stars are: ...
Chapter22_New
... be different for HII regions, but the emission line output is the same. 2. The Shape and Size of the Galaxy I like to use the subject of the size and shape of the galaxy as an example of the way that science often proceeds by fits and starts with some wrong turns. I treat the work of Herschel and Ka ...
... be different for HII regions, but the emission line output is the same. 2. The Shape and Size of the Galaxy I like to use the subject of the size and shape of the galaxy as an example of the way that science often proceeds by fits and starts with some wrong turns. I treat the work of Herschel and Ka ...
Acting Out the Life Cycle of Stars - University of Texas Astronomy
... dense and hot core is now a white dwarf. The planetary nebula will continue to expand and eventually fade away, with its gas becoming part of the ISM from which it originally came. The white dwarf isn’t creating any new energy and will just slowly fade away like the dying ember of a fire. The Ring N ...
... dense and hot core is now a white dwarf. The planetary nebula will continue to expand and eventually fade away, with its gas becoming part of the ISM from which it originally came. The white dwarf isn’t creating any new energy and will just slowly fade away like the dying ember of a fire. The Ring N ...
The Universe - Lancaster High School
... 2. Nova – Stars bigger than Sun – explosion 3. Supernova – Most massive stars – Chuck Norris of explosions. -can be as bright as an entire galaxy ...
... 2. Nova – Stars bigger than Sun – explosion 3. Supernova – Most massive stars – Chuck Norris of explosions. -can be as bright as an entire galaxy ...
Astr 40 Final Exam Review ()
... 91. The Milky Way is a typical large spiral galaxy. 92. Dark matter is thought to exist in galaxies and galactic clusters. 93. A galaxy with a disk and a nucleus but no spirals is called and S0 galaxy in the Hubble Tuning Fork. 94. Though quasars were named quasi-stellar objects early on, they are n ...
... 91. The Milky Way is a typical large spiral galaxy. 92. Dark matter is thought to exist in galaxies and galactic clusters. 93. A galaxy with a disk and a nucleus but no spirals is called and S0 galaxy in the Hubble Tuning Fork. 94. Though quasars were named quasi-stellar objects early on, they are n ...
Document
... The Milky Way Galaxy is a giant disk of stars 160,000 light-years across and 1,000 light-years thick. The Sun is located at the edge of a spiral arm, 30,000 light-years from the center It takes 250 Million years for the Sun to complete one orbit ...
... The Milky Way Galaxy is a giant disk of stars 160,000 light-years across and 1,000 light-years thick. The Sun is located at the edge of a spiral arm, 30,000 light-years from the center It takes 250 Million years for the Sun to complete one orbit ...
Stellar Evolution
... expand and are driven off. This gas is called a planetary nebula. Only the core is left which is a white hot ball of carbon called a white dwarf. ...
... expand and are driven off. This gas is called a planetary nebula. Only the core is left which is a white hot ball of carbon called a white dwarf. ...
White Dwarf
... • After explosions the remaining core collapses due to gravity. – Radiation too weak ...
... • After explosions the remaining core collapses due to gravity. – Radiation too weak ...
The Sun and the Stars
... • Gases near a sunspot that suddenly brighten, shooting gas outward at high speeds, are called solar flares ...
... • Gases near a sunspot that suddenly brighten, shooting gas outward at high speeds, are called solar flares ...
Document
... USING KEY TERMS The statements below are false. For each statement, replace the underlined term to make a true statement. ...
... USING KEY TERMS The statements below are false. For each statement, replace the underlined term to make a true statement. ...
Stars & Galaxies
... After this kind of star becomes a supernova, more than five times the mass of the sun may be left. ...
... After this kind of star becomes a supernova, more than five times the mass of the sun may be left. ...
ASTR-1020 Exam 2 Review Questions
... 8. What is the difference between an observational and theoretical H-R diagram? What is meant by spectroscopic parallax? 9. What are the strongest spectral features in A stars? What are the strongest spectral features in M stars? What are the strongest optical spectral lines in the Sun? 10. What thr ...
... 8. What is the difference between an observational and theoretical H-R diagram? What is meant by spectroscopic parallax? 9. What are the strongest spectral features in A stars? What are the strongest spectral features in M stars? What are the strongest optical spectral lines in the Sun? 10. What thr ...
Bubble Nebulae Around Ultra-luminous X
... in external galaxies with luminosities greatly exceeding the Eddington luminosity of a stellar-mass compact object, assuming isotropic emission. The irregular variability, observed on time scales from seconds to years, suggests that ULXs are binary systems containing a compact object that is either ...
... in external galaxies with luminosities greatly exceeding the Eddington luminosity of a stellar-mass compact object, assuming isotropic emission. The irregular variability, observed on time scales from seconds to years, suggests that ULXs are binary systems containing a compact object that is either ...
Sample exam 2
... 10. When the Sun enters its red giant phase (the unstable portion of its life cycle), it will (choose one): a. move from luminosity class V to class III b. move from luminosity class I to class V c. move from spectral type G to spectral type O d. move from spectral type M to spectral type G e. not c ...
... 10. When the Sun enters its red giant phase (the unstable portion of its life cycle), it will (choose one): a. move from luminosity class V to class III b. move from luminosity class I to class V c. move from spectral type G to spectral type O d. move from spectral type M to spectral type G e. not c ...
Problem set 1 1. The binding energy per nucleon for 56Fe is 8.8MeV
... 2. The main sequence of the Pleiades cluster of stars consists of stars with mass less than 6M ; the more massive stars have already evolved off the main sequence. Estimate the age of the Pleiades cluster. 3. Given that the luminosity of the sun is 3.8 × 1026 W and that the absolute bolometric magn ...
... 2. The main sequence of the Pleiades cluster of stars consists of stars with mass less than 6M ; the more massive stars have already evolved off the main sequence. Estimate the age of the Pleiades cluster. 3. Given that the luminosity of the sun is 3.8 × 1026 W and that the absolute bolometric magn ...
01 - cloudfront.net
... amount of electromagnetic energy 2. From Earth, stars appear as tiny specs of white light, but they actually vary in color. 3. B 4. A 5. C 6. D 7. C 8. A 9. the elements that make up the star 10. hydrogen; helium 11. A 12. C 13. B 14. the surface temperature of the star 15. 2,800 C to 24,000 C 16. ...
... amount of electromagnetic energy 2. From Earth, stars appear as tiny specs of white light, but they actually vary in color. 3. B 4. A 5. C 6. D 7. C 8. A 9. the elements that make up the star 10. hydrogen; helium 11. A 12. C 13. B 14. the surface temperature of the star 15. 2,800 C to 24,000 C 16. ...
30-3
... _____ 2. Although the stars that make up a pattern appear to be close together, a. they are not all the same distance from Earth. b. they are not all stars. c. they are all the same distance from Earth. d. they are not all visible from Earth. _____ 3. If you look at the same region of the sky for se ...
... _____ 2. Although the stars that make up a pattern appear to be close together, a. they are not all the same distance from Earth. b. they are not all stars. c. they are all the same distance from Earth. d. they are not all visible from Earth. _____ 3. If you look at the same region of the sky for se ...
Sky News – March 2015 The Realm of the Galaxies
... west with the onset of darkness, bringing the spring constellations of Leo, Virgo, Coma Bernices and Ursa Major into prominence. It is within these that hosts of galaxies reside. The North Galactic Pole, the point in the sky directly over the centre of our galaxy, is in the constellation Coma Bernic ...
... west with the onset of darkness, bringing the spring constellations of Leo, Virgo, Coma Bernices and Ursa Major into prominence. It is within these that hosts of galaxies reside. The North Galactic Pole, the point in the sky directly over the centre of our galaxy, is in the constellation Coma Bernic ...
1_Introduction - Department of Astronomy
... originally (dark matter) sponge cake & (ordinary matter) creme filling coexist. ...
... originally (dark matter) sponge cake & (ordinary matter) creme filling coexist. ...
H II region
An H II region is a large, low-density cloud of partially ionized gas in which star formation has recently taken place. The short-lived blue stars forged in these regions emit copious amounts of ultraviolet light that ionize the surrounding gas. H II regions—sometimes several hundred light-years across—are often associated with giant molecular clouds. The first known H II region was the Orion Nebula, which was discovered in 1610 by Nicolas-Claude Fabri de Peiresc.H II regions are named for the large amount of ionised atomic hydrogen they contain, referred to as H II, pronounced H-two by astronomers (an H I region being neutral atomic hydrogen, and H2 being molecular hydrogen). Such regions have extremely diverse shapes, because the distribution of the stars and gas inside them is irregular. They often appear clumpy and filamentary, sometimes showing bizarre shapes such as the Horsehead Nebula. H II regions may give birth to thousands of stars over a period of several million years. In the end, supernova explosions and strong stellar winds from the most massive stars in the resulting star cluster will disperse the gases of the H II region, leaving behind a cluster of birthed stars such as the Pleiades.H II regions can be seen to considerable distances in the universe, and the study of extragalactic H II regions is important in determining the distance and chemical composition of other galaxies. Spiral and irregular galaxies contain many H II regions, while elliptical galaxies are almost devoid of them. In the spiral galaxies, including the Milky Way, H II regions are concentrated in the spiral arms, while in the irregular galaxies they are distributed chaotically. Some galaxies contain huge H II regions, which may contain tens of thousands of stars. Examples include the 30 Doradus region in the Large Magellanic Cloud and NGC 604 in the Triangulum Galaxy.