nasafinal - University of Oregon
... image one sees essentially two blue oval rings. The inner one corresponds to the optical size of the galaxy as shown previously. The outer one, which is clearly seen in this color difference image, is a nearly continuous ring of hot stars, again ...
... image one sees essentially two blue oval rings. The inner one corresponds to the optical size of the galaxy as shown previously. The outer one, which is clearly seen in this color difference image, is a nearly continuous ring of hot stars, again ...
A Study of the Spiral Galaxy M101 Elizabeth City State University
... filters isolated select wavelengths of light to allow one to examine the galaxy in detail and look for regions of high and low ionization, including HII regions. Table 3 describes the observing site. The Image Reduction and Analysis Facility (IRAF) is the software that was used for the image reducti ...
... filters isolated select wavelengths of light to allow one to examine the galaxy in detail and look for regions of high and low ionization, including HII regions. Table 3 describes the observing site. The Image Reduction and Analysis Facility (IRAF) is the software that was used for the image reducti ...
Lecture Eleven (Powerpoint format)
... “The Shapley-Curtis debate makes interesting reading even today. It is important, not only as a historical document, but also as a glimpse into the reasoning processes of eminent scientists engaged in a great controversy for which the evidence on both sides is fragmentary and partly faulty. This d ...
... “The Shapley-Curtis debate makes interesting reading even today. It is important, not only as a historical document, but also as a glimpse into the reasoning processes of eminent scientists engaged in a great controversy for which the evidence on both sides is fragmentary and partly faulty. This d ...
File - The World of Astronomy
... million to over a trillion stars and can range in size from a few thousand to several hundred thousand light-years across. There are hundreds of billions of galaxies in the universe. Galaxies come in many different sizes, shapes and brightnesses and, like stars, are found alone, in pairs, or in larg ...
... million to over a trillion stars and can range in size from a few thousand to several hundred thousand light-years across. There are hundreds of billions of galaxies in the universe. Galaxies come in many different sizes, shapes and brightnesses and, like stars, are found alone, in pairs, or in larg ...
the galaxy in which we live - Cosmos
... radiation, and invisible material (dark matter), are gravitationally bound forming a much larger structure: our Milky Way Galaxy. There are huge numbers of galaxies apart from our own, constituting the basic structural units of the Universe. ...
... radiation, and invisible material (dark matter), are gravitationally bound forming a much larger structure: our Milky Way Galaxy. There are huge numbers of galaxies apart from our own, constituting the basic structural units of the Universe. ...
Ch. 23
... These objects are very close to the Galactic center. The orbit on the right is the best fit; it assumes a central black hole of 3.7 million solar masses. ...
... These objects are very close to the Galactic center. The orbit on the right is the best fit; it assumes a central black hole of 3.7 million solar masses. ...
The Missing Mass
... • Many of the stars will be faint, red main sequence stars, but some will be bright blue O and B stars. These stars will continue to drift through the region. • The O and B stars don’t go far before they go supernova. The brightest (and bluest) of a galaxy’s stars will never be far from the spiral a ...
... • Many of the stars will be faint, red main sequence stars, but some will be bright blue O and B stars. These stars will continue to drift through the region. • The O and B stars don’t go far before they go supernova. The brightest (and bluest) of a galaxy’s stars will never be far from the spiral a ...
Astronomy 1020 Exam 4 Review Questions
... 1. What is meant by the asymptotic giant branch? Describe the interior structure of a star when it is on the AGB. 2. What is meant by dredge up and by thermal pulse ? 3. How are carbon stars made? 4. What is a planetary nebula? Why does such a nebula shine? 5. What are the differences between a deta ...
... 1. What is meant by the asymptotic giant branch? Describe the interior structure of a star when it is on the AGB. 2. What is meant by dredge up and by thermal pulse ? 3. How are carbon stars made? 4. What is a planetary nebula? Why does such a nebula shine? 5. What are the differences between a deta ...
Supermassive black holes
... A galaxy with a disk and prominent bulge but with no obvious spiral arms. Although they can have dust, they have little gas and do not have much star formation and are mostly older stars ...
... A galaxy with a disk and prominent bulge but with no obvious spiral arms. Although they can have dust, they have little gas and do not have much star formation and are mostly older stars ...
Milky Way I
... • The thickness of the disk is only 300pc (1000 light years) on average. • The total detectable mass is 200 billion solar masses. ...
... • The thickness of the disk is only 300pc (1000 light years) on average. • The total detectable mass is 200 billion solar masses. ...
The Origin of the Milky Way
... The Galaxy is shaped like a disk The Sun is located at the inner edge of a spiral arm about 2/3 of the way out from the center to the edge The main components of the Galaxy are the disk, the bulge, and the halo We can measure the mass of the Galaxy from the orbits of stars ...
... The Galaxy is shaped like a disk The Sun is located at the inner edge of a spiral arm about 2/3 of the way out from the center to the edge The main components of the Galaxy are the disk, the bulge, and the halo We can measure the mass of the Galaxy from the orbits of stars ...
Miss Nevoral - Ms. Nevoral`s site
... ideas about a theory may change if new evidence arises or there is a breakthrough with technology, etc. Therefore, we can not say that a theory is a fact because more evidence may be found to change that theory. 3. Define celestial bodies: General term for all objects in the sky Sun, moon, planets ...
... ideas about a theory may change if new evidence arises or there is a breakthrough with technology, etc. Therefore, we can not say that a theory is a fact because more evidence may be found to change that theory. 3. Define celestial bodies: General term for all objects in the sky Sun, moon, planets ...
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 ...
Intelligent Life in the Milky Way Galaxy
... Individuals with traits that best allow them to survive and reproduce will on average produce the greatest number of surviving offspring. ...
... Individuals with traits that best allow them to survive and reproduce will on average produce the greatest number of surviving offspring. ...
The Milky Way Galaxy (ch. 23)
... through the disk. (Think of sound waves—the gas itself doesn’t move from one place to another.) Gas passing through wave is slowed down and compressed, get enhanced star formation (23.18 and Discovery 232). b. Self-propagating star formation---Star formation at one location causes explosions that co ...
... through the disk. (Think of sound waves—the gas itself doesn’t move from one place to another.) Gas passing through wave is slowed down and compressed, get enhanced star formation (23.18 and Discovery 232). b. Self-propagating star formation---Star formation at one location causes explosions that co ...
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.