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... modeling work is stagnant and usually focuses on local galaxies where spiral arms are already formed and settled. Breakthroughs can come from observations of rare high-redshift spiral galaxies where spiral arms are in their initial stages of formation. In this talk, I will show the first result from ...
... modeling work is stagnant and usually focuses on local galaxies where spiral arms are already formed and settled. Breakthroughs can come from observations of rare high-redshift spiral galaxies where spiral arms are in their initial stages of formation. In this talk, I will show the first result from ...
ppt document - FacStaff Home Page for CBU
... Way. By looking in the infrared (which is not scattered as much as visible light by the dust and gas), we see that we are not in the center of the disk, but somewhere away from the center. The approximate size of the Milky Way appears to be about 100,000 light years across and 2,000 light years thic ...
... Way. By looking in the infrared (which is not scattered as much as visible light by the dust and gas), we see that we are not in the center of the disk, but somewhere away from the center. The approximate size of the Milky Way appears to be about 100,000 light years across and 2,000 light years thic ...
Molecular clouds
... • How is gas recycled in our galaxy? — Gas from dying stars mixes new elements into the interstellar medium which slowly cools, making the molecular clouds where stars form. — Those stars will eventually return much of their matter to interstellar space. ...
... • How is gas recycled in our galaxy? — Gas from dying stars mixes new elements into the interstellar medium which slowly cools, making the molecular clouds where stars form. — Those stars will eventually return much of their matter to interstellar space. ...
Ecosystems, from life, to the Earth, to the Galaxy
... cycles. The maintenance of conditions comfortable for life over nearly 4 billion years, despite the solar energy output having increased by 25% in that time, attests to this. The evolution of the biota has been largely responsible for the change in the atmospheric composition at the end of the Arche ...
... cycles. The maintenance of conditions comfortable for life over nearly 4 billion years, despite the solar energy output having increased by 25% in that time, attests to this. The evolution of the biota has been largely responsible for the change in the atmospheric composition at the end of the Arche ...
Here
... Galaxies. They are usually located at the center of clusters of galaxies, or in areas with dense population of galaxies. This excess emission indicates the presence of an extended halo. The cD halos are thought to belong to the cluster rather than to the galaxy. ...
... Galaxies. They are usually located at the center of clusters of galaxies, or in areas with dense population of galaxies. This excess emission indicates the presence of an extended halo. The cD halos are thought to belong to the cluster rather than to the galaxy. ...
Chapter14(4-7-11)
... We see our galaxy edge-on Primary features: disk, bulge, halo, globular clusters ...
... We see our galaxy edge-on Primary features: disk, bulge, halo, globular clusters ...
Lecture 8: The distance ladder
... – from the circular velocity formula, M ∝ vmax2 Rd – again assuming M/L is constant and using an expression for L, we get vmax2 ∝ Rd – and as L ∝ Rd2 if the central brightnesses I0 are the same.... then L ∝ vmax4 Galaxies – AS 3011 ...
... – from the circular velocity formula, M ∝ vmax2 Rd – again assuming M/L is constant and using an expression for L, we get vmax2 ∝ Rd – and as L ∝ Rd2 if the central brightnesses I0 are the same.... then L ∝ vmax4 Galaxies – AS 3011 ...
Quiz 2 Lecture 12
... c. it contains mostly elliptical galaxies. d. it contains billions of galaxies. answer: c ...
... c. it contains mostly elliptical galaxies. d. it contains billions of galaxies. answer: c ...
19. Our Galaxy 19.1 The Milky Way Revealed Our goals for learning
... • When numerous supernovae occur relatively near each other and within a few million years of each other, the shock waves from the individual events may merge to form an enormous superbubble. In some places, superbubbles may blow through the galactic disk, creating a fountain of hot, ionized gas tha ...
... • When numerous supernovae occur relatively near each other and within a few million years of each other, the shock waves from the individual events may merge to form an enormous superbubble. In some places, superbubbles may blow through the galactic disk, creating a fountain of hot, ionized gas tha ...
Spiral structure of the Third Galactic Quadrant and the solution to the
... to be younger than 100 million years. These are listed in Table 1 and plotted in Fig. 2 which represents the third quadrant of the Galactic plane seen from above. Also plotted, are the BPs detected in the backgrounds of several clusters. A strip about 1.5 kpc wide, extending from l=210o to l=260o , ...
... to be younger than 100 million years. These are listed in Table 1 and plotted in Fig. 2 which represents the third quadrant of the Galactic plane seen from above. Also plotted, are the BPs detected in the backgrounds of several clusters. A strip about 1.5 kpc wide, extending from l=210o to l=260o , ...
Document
... L = 20 trillion Lsun (or 1000 Milky Way’s) for 3C273 These point-like sources were the most luminous objects that had been found in the Universe at that time! Within ~2 years, quasars were discovered that were 10 billion light years away and L 100 trillion Lsun. The most distant quasar known today ...
... L = 20 trillion Lsun (or 1000 Milky Way’s) for 3C273 These point-like sources were the most luminous objects that had been found in the Universe at that time! Within ~2 years, quasars were discovered that were 10 billion light years away and L 100 trillion Lsun. The most distant quasar known today ...
PH607lec10-4gal2
... axis of the galaxy has been spread into a spectrum, between about 6500 and 6800 Angstroms. ...
... axis of the galaxy has been spread into a spectrum, between about 6500 and 6800 Angstroms. ...
9 Dwarf Galaxies
... alpha at 6563 Angstroms (the brightest line), as well as other fainter lines in this region due to [NII]. HII regions appear reddish in this image because of the prominence of the H alpha line in the red region of the spectrum. ...
... alpha at 6563 Angstroms (the brightest line), as well as other fainter lines in this region due to [NII]. HII regions appear reddish in this image because of the prominence of the H alpha line in the red region of the spectrum. ...
Part 2 - Aryabhat
... ejected as a planetary nebula similar to the famed Ring Nebula in Lyra. What will be left behind is a white dwarf. Arcturus is the Alpha (meaning brightest) star of the springtime constellation Bootes, The Herdsman. You can find it by using the Big Dipper as your celestial guidepost. Follow the arc ...
... ejected as a planetary nebula similar to the famed Ring Nebula in Lyra. What will be left behind is a white dwarf. Arcturus is the Alpha (meaning brightest) star of the springtime constellation Bootes, The Herdsman. You can find it by using the Big Dipper as your celestial guidepost. Follow the arc ...
Andromeda Galaxy
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The Andromeda Galaxy (/ænˈdrɒmɨdə/), also known as Messier 31, M31, or NGC 224, is a spiral galaxy approximately 780 kiloparsecs (2.5 million light-years) from Earth. It is the nearest major galaxy to the Milky Way and was often referred to as the Great Andromeda Nebula in older texts. It received its name from the area of the sky in which it appears, the constellation of Andromeda, which was named after the mythological princess Andromeda. Being approximately 220,000 light years across, it is the largest galaxy of the Local Group, which also contains the Milky Way, the Triangulum Galaxy, and about 44 other smaller galaxies.The Andromeda Galaxy is the most massive galaxy in the Local Group as well. Despite earlier findings that suggested that the Milky Way contains more dark matter and could be the most massive in the grouping, the 2006 observations by the Spitzer Space Telescope revealed that Andromeda contains one trillion (1012) stars: at least twice the number of stars in the Milky Way, which is estimated to be 200–400 billion.The Andromeda Galaxy is estimated to be 1.5×1012 solar masses, while the mass of the Milky Way is estimated to be 8.5×1011 solar masses. In comparison, a 2009 study estimated that the Milky Way and M31 are about equal in mass, while a 2006 study put the mass of the Milky Way at ~80% of the mass of the Andromeda Galaxy. The Milky Way and Andromeda are expected to collide in 3.75 billion years, eventually merging to form a giant elliptical galaxy or perhaps a large disk galaxy.At 3.4, the apparent magnitude of the Andromeda Galaxy is one of the brightest of any of the Messier objects, making it visible to the naked eye on moonless nights even when viewed from areas with moderate light pollution. Although it appears more than six times as wide as the full Moon when photographed through a larger telescope, only the brighter central region is visible to the naked eye or when viewed using binoculars or a small telescope and would it hence appear to be but another star.