Astronomy
... stars whose mass is typically between one and several times that of the Sun, but their size is only 10 km or less. A. White dwarfs B. Neutron stars C. Pulsars D. Black dwarfs ...
... stars whose mass is typically between one and several times that of the Sun, but their size is only 10 km or less. A. White dwarfs B. Neutron stars C. Pulsars D. Black dwarfs ...
Chapter 12
... shows the highestmass stars that are still on the main sequence. After 1 billion years, the main-sequence turnoff is much clearer. Copyright © 2010 Pearson Education, Inc. ...
... shows the highestmass stars that are still on the main sequence. After 1 billion years, the main-sequence turnoff is much clearer. Copyright © 2010 Pearson Education, Inc. ...
Spring 2017 - Astronomers of Humboldt
... On February 11, AOH members gathered at the Humboldt Area Foundation for the “Annual” Potluck Dinner. This occasion also celebrated the 60th anniversary of the founding of the Astronomers of Humboldt (albeit a month late). The emphasis on “Annual” was because this was the first potluck dinner since ...
... On February 11, AOH members gathered at the Humboldt Area Foundation for the “Annual” Potluck Dinner. This occasion also celebrated the 60th anniversary of the founding of the Astronomers of Humboldt (albeit a month late). The emphasis on “Annual” was because this was the first potluck dinner since ...
10. The Lives of the Stars
... larger, redder, and much more luminous — at least for a while. . . ...
... larger, redder, and much more luminous — at least for a while. . . ...
PPTX
... Conclusions: V605 Aql • HST images resolve compact dusty nebula at site of 1919 born-again VLTP • Angular expansion consistent with ejection in 1919 • Ejection was non-spherical: compact nebula is bisected by dark band • Central star is visible in stellar C IV line • Dark band is parallel to major ...
... Conclusions: V605 Aql • HST images resolve compact dusty nebula at site of 1919 born-again VLTP • Angular expansion consistent with ejection in 1919 • Ejection was non-spherical: compact nebula is bisected by dark band • Central star is visible in stellar C IV line • Dark band is parallel to major ...
The galaxies that host powerful radio sources
... • Optically faint (R>25). • Faint at radio and IR wavelengths. These facts suggest they are distant and dusty. ...
... • Optically faint (R>25). • Faint at radio and IR wavelengths. These facts suggest they are distant and dusty. ...
Measuring Interstellar Extinction
... The interstellar extinction of starlight is the most indicative phenomenon revealing the presence of diffuse dark matter in the Galaxy. The first documented observation of extinction effects, appearing in the form of dark regions, is that of Sir William Herschel who in 1784 observed a section of the ...
... The interstellar extinction of starlight is the most indicative phenomenon revealing the presence of diffuse dark matter in the Galaxy. The first documented observation of extinction effects, appearing in the form of dark regions, is that of Sir William Herschel who in 1784 observed a section of the ...
Problem 1. Marking scheme Lagrange Point
... 3. The solutions of the problems will be written down only on the answer sheets you receive on your desk. PLEASE WRITE ONLY ON THE PRINTED SIDE OF THE PAPER SHEET. DON’T USE THE REVERSE SIDE. The evaluator will not take into account what is written on the reverse of the answer sheet. 4. The draft sh ...
... 3. The solutions of the problems will be written down only on the answer sheets you receive on your desk. PLEASE WRITE ONLY ON THE PRINTED SIDE OF THE PAPER SHEET. DON’T USE THE REVERSE SIDE. The evaluator will not take into account what is written on the reverse of the answer sheet. 4. The draft sh ...
AST 301 Introduction to Astronomy - University of Texas Astronomy
... But the core will be the left-over white dwarf. The gas put back out into space will come from the red giant’s envelope, which hasn’t been hot enough for fusion to make new elements. Most of the elements in space were put there by supernova explosions. ...
... But the core will be the left-over white dwarf. The gas put back out into space will come from the red giant’s envelope, which hasn’t been hot enough for fusion to make new elements. Most of the elements in space were put there by supernova explosions. ...
CONSTELLATION POWER POINT PROJECT
... wanted nothing to do with a god. Pulling a trick, Jupiter changed himself into a white bull and walked towards Europa who was picking flowers in a nearby field. Europa was then impressed and eventually got on the bull's back. Immediately the bull ran away and took Europa back to Crete. There, Jupite ...
... wanted nothing to do with a god. Pulling a trick, Jupiter changed himself into a white bull and walked towards Europa who was picking flowers in a nearby field. Europa was then impressed and eventually got on the bull's back. Immediately the bull ran away and took Europa back to Crete. There, Jupite ...
How far away are the Stars?
... • The closer the object the larger the parallax. • Parallaxes are usually very small. Parallax of Venus at closest approach (45 million km) is 1 arc minute! • Parallax of nearby (25 light years) stars not observed/measured until 1839! ...
... • The closer the object the larger the parallax. • Parallaxes are usually very small. Parallax of Venus at closest approach (45 million km) is 1 arc minute! • Parallax of nearby (25 light years) stars not observed/measured until 1839! ...
Assignment 10
... ____ 23. Active radio galaxies can display a. strong emission from a small central source b. long jets of radio emissions c. two lobes (regions of radio emission) that can be quite far from the galaxy's center d. all of the above e. none of the above ____ 24. A friend of yours who is a science ficti ...
... ____ 23. Active radio galaxies can display a. strong emission from a small central source b. long jets of radio emissions c. two lobes (regions of radio emission) that can be quite far from the galaxy's center d. all of the above e. none of the above ____ 24. A friend of yours who is a science ficti ...
5th
... The Perseids are called so because the point they appear to be coming from, called the radiant, is in the constellation of Perseus, which is a northern constellation, named after the Greek hero who slew the monster Medusa. However, they can be spotted all around the sky. Because of the positioning o ...
... The Perseids are called so because the point they appear to be coming from, called the radiant, is in the constellation of Perseus, which is a northern constellation, named after the Greek hero who slew the monster Medusa. However, they can be spotted all around the sky. Because of the positioning o ...
Astronomy Astrophysics First detection of the field star overdensity in the Perseus... &
... the two sets of physical parameters. This cleanest sample contains 8328 stars and is named CS-MB or CS-EC depending on whether their physical parameters were computed using the MB or EC method (see Fig. 1). This sample contains stars with more accurate SPP data, but has fewer statistics owing to the ...
... the two sets of physical parameters. This cleanest sample contains 8328 stars and is named CS-MB or CS-EC depending on whether their physical parameters were computed using the MB or EC method (see Fig. 1). This sample contains stars with more accurate SPP data, but has fewer statistics owing to the ...
What is the minimum size of a star that will go supernova? A. Half
... This red giant, one of the largest and brightest stars known, lies in the constellation Orion. Be careful not to say its name three times though or you could end up in trouble. A. Pollux B. Gemini C. Betelgeuse Answer: C. Betelgeuse It lies 640 light years from Earth. Betelgeuse’s radiu ...
... This red giant, one of the largest and brightest stars known, lies in the constellation Orion. Be careful not to say its name three times though or you could end up in trouble. A. Pollux B. Gemini C. Betelgeuse Answer: C. Betelgeuse It lies 640 light years from Earth. Betelgeuse’s radiu ...
Stellar Physics
... They also have a higher dynamic range, meaning that they respond in a more uniform, or linear, way to brighter sources. Whereas photographic film has a tendency to saturate when brightly illuminated and so no longer gives an accurate measure of the true brightness of the source. A CCD is a collectio ...
... They also have a higher dynamic range, meaning that they respond in a more uniform, or linear, way to brighter sources. Whereas photographic film has a tendency to saturate when brightly illuminated and so no longer gives an accurate measure of the true brightness of the source. A CCD is a collectio ...
Supermassive Black Holes in Inactive Galaxies Encyclopedia of Astronomy & Astrophysics eaa.iop.org
... M31 is the highest-luminosity galaxy in the LOCAL GROUP. At a distance of 0.77 Mpc, it is the nearest giant galaxy outside our own. It can therefore be studied in unusual detail. M31 contains the nearest example of a nuclear star cluster embedded in a normal bulge. When examined with HST, the nucleu ...
... M31 is the highest-luminosity galaxy in the LOCAL GROUP. At a distance of 0.77 Mpc, it is the nearest giant galaxy outside our own. It can therefore be studied in unusual detail. M31 contains the nearest example of a nuclear star cluster embedded in a normal bulge. When examined with HST, the nucleu ...
Stars: Their Life and Afterlife
... First, if the mass were much greater than this, the gravitational force would be able to overcome the electron degeneracy pressure, and the star would contract and heat to the point where further fusion – and evolution – were possible. Second, at about this mass a process called “neutronization” bec ...
... First, if the mass were much greater than this, the gravitational force would be able to overcome the electron degeneracy pressure, and the star would contract and heat to the point where further fusion – and evolution – were possible. Second, at about this mass a process called “neutronization” bec ...
CHAPTER 7—ATOMS AND STARLIGHT
... The _______________ of a gas is a measure of the average speed of the particles in the gas. a. heat b. composition c. temperature d. blue shift e. binding energy The two most abundant elements in the sun are a. nitrogen and oxygen. b. hydrogen and helium. c. sulfur and iron. d. carbon and hydrogen. ...
... The _______________ of a gas is a measure of the average speed of the particles in the gas. a. heat b. composition c. temperature d. blue shift e. binding energy The two most abundant elements in the sun are a. nitrogen and oxygen. b. hydrogen and helium. c. sulfur and iron. d. carbon and hydrogen. ...
AN ATTEMPT To prove the MOTION OF THE EARTH FROM
... then that of a minute: and where two objects are not farther distant then a minute, if they are bright objects, they coalesce and appear one, though I confess, if they be dark objects, and a light be interposed, the distance between them shall be visible, though really much less then a Second; and y ...
... then that of a minute: and where two objects are not farther distant then a minute, if they are bright objects, they coalesce and appear one, though I confess, if they be dark objects, and a light be interposed, the distance between them shall be visible, though really much less then a Second; and y ...
Basics of Astrophysics
... With a rather stable atmosphere (v= 10 km h-‐1) and a cell size of 10 cm t= 0.04 s. Exposure times are much larger than this value, during an exposure time of several seconds or more th ...
... With a rather stable atmosphere (v= 10 km h-‐1) and a cell size of 10 cm t= 0.04 s. Exposure times are much larger than this value, during an exposure time of several seconds or more th ...
File
... dust, and little formation of new stars. Elliptical galaxies range greatly in size, from ten million solar masses to one hundred times the mass of the Milky Way. ...
... dust, and little formation of new stars. Elliptical galaxies range greatly in size, from ten million solar masses to one hundred times the mass of the Milky Way. ...
The Cosmic Perspective Star Stuff
... cool and dim after their initial formation. c) Nuclear fission would be impossible and elements heavier than iron would not exist. d) Stars would continue burning heavier and heavier elements and the universe would have far more lead and uranium. e) Stars would be much less dense, and therefore l ...
... cool and dim after their initial formation. c) Nuclear fission would be impossible and elements heavier than iron would not exist. d) Stars would continue burning heavier and heavier elements and the universe would have far more lead and uranium. e) Stars would be much less dense, and therefore l ...
Perseus (constellation)
Perseus, named after the Greek mythological hero Perseus, is a constellation in the northern sky. It was one of 48 listed by the 2nd-century astronomer Ptolemy and among the 88 modern constellations defined by the International Astronomical Union (IAU). It is located in the northern celestial hemisphere near several other constellations named after legends surrounding Perseus, including Andromeda to the west and Cassiopeia to the north. Perseus is also bordered by Aries and Taurus to the south, Auriga to the east, Camelopardalis to the north, and Triangulum to the west.The galactic plane of the Milky Way passes through Perseus but is mostly obscured by molecular clouds. The constellation's brightest star is the yellow-white supergiant Alpha Persei (also called Mirfak), which shines at magnitude 1.79. It and many of the surrounding stars are members of an open cluster known as the Alpha Persei Cluster. The best-known star, however, is Algol (Beta Persei), linked with ominous legends because of its variability, which is noticeable to the naked eye. Rather than being an intrinsically variable star, it is an eclipsing binary. Other notable star systems in Perseus include X Persei, a binary system containing a neutron star, and GK Persei, a nova that peaked at magnitude 0.2 in 1901. The Double Cluster, comprising two open clusters quite near each other in the sky, was known to the ancient Chinese. The constellation gives its name to the Perseus Cluster (Abell 426), a massive galaxy cluster located 250 million light-years from Earth. It hosts the radiant of the annual Perseids meteor shower—one of the most prominent meteor showers in the sky.