POISE AND EVOLUTION OF THE GALAXY : STRUCTURE ,
... luminous stars ; with a similar width, of the order of 1000 light-years, at least [Fig. 1a]. Such a reconstituted shape is by no way exceptional : quite a lot of galaxies, probably spiral as seen edgeon, in profile, indeed, display such a sandwich structure in direct observation, through the lengthy ...
... luminous stars ; with a similar width, of the order of 1000 light-years, at least [Fig. 1a]. Such a reconstituted shape is by no way exceptional : quite a lot of galaxies, probably spiral as seen edgeon, in profile, indeed, display such a sandwich structure in direct observation, through the lengthy ...
BSA Astronomy Merit Badge
... Be gentle. When you are helping a person with hypothermia, handle him or her gently. Limit movements to only those that are necessary. Don't massage or rub the person. Excessive, vigorous or jarring movements may trigger cardiac arrest. Move the person out of the cold. Move the person to a warm, dry ...
... Be gentle. When you are helping a person with hypothermia, handle him or her gently. Limit movements to only those that are necessary. Don't massage or rub the person. Excessive, vigorous or jarring movements may trigger cardiac arrest. Move the person out of the cold. Move the person to a warm, dry ...
The cosmic distance scale
... circular orbits, but has some random motion, whose effect is to broaden the observed lines. This can be estimated to be typically 10 km/s. The second effect is due to the inclination. The width that we measure is essentially 2 Vc sin i. Therefore, the quantity WR = (W20- Wrand)/sin i is an inclinati ...
... circular orbits, but has some random motion, whose effect is to broaden the observed lines. This can be estimated to be typically 10 km/s. The second effect is due to the inclination. The width that we measure is essentially 2 Vc sin i. Therefore, the quantity WR = (W20- Wrand)/sin i is an inclinati ...
Quasars- The Brightest Black Holes
... emission on its own. The observations were carried out by Cyril Hazard (with MB Mackey and J Shimmins) at the new Parkes radio dish in Australia. They discovered that the radio emission from 3C273 was distributed into two close components. The improved coordinates clearly indicated that one componen ...
... emission on its own. The observations were carried out by Cyril Hazard (with MB Mackey and J Shimmins) at the new Parkes radio dish in Australia. They discovered that the radio emission from 3C273 was distributed into two close components. The improved coordinates clearly indicated that one componen ...
NASA FUSE Satellite Solves the Case of the Missing Deuterium
... computer models that showed how deuterium, compared to hydrogen, might preferentially bind to interstellar dust grains, changing from an easily detectable gaseous form to an unobservable solid form. The new FUSE data strongly support this theory. In regions that remain undisturbed for long periods, ...
... computer models that showed how deuterium, compared to hydrogen, might preferentially bind to interstellar dust grains, changing from an easily detectable gaseous form to an unobservable solid form. The new FUSE data strongly support this theory. In regions that remain undisturbed for long periods, ...
Formation of Globular Clusters: In and Out of Dwarf Galaxies
... • Globular clusters may form in giant molecular clouds in progenitor galaxies at intermediate redshifts • Model explains observed sizes, masses, ages, metallicities • Dynamical evolution explains the present mass function and may be important for metallicity bimodality • Red clusters in the Galaxy a ...
... • Globular clusters may form in giant molecular clouds in progenitor galaxies at intermediate redshifts • Model explains observed sizes, masses, ages, metallicities • Dynamical evolution explains the present mass function and may be important for metallicity bimodality • Red clusters in the Galaxy a ...
Galaxies
... galaxy looks like in the UV (it would probably not be classified as an Sb). If M81 would have been at z=1, it would look like in the right image. ...
... galaxy looks like in the UV (it would probably not be classified as an Sb). If M81 would have been at z=1, it would look like in the right image. ...
Galaxies
... e. the stars in the spiral arms emit most of their energy at radio wavelengths. If the spiral density wave were the only thing producing spiral arms, it would be expected that a. all spiral arms would be dust free. b. all galaxies would have only two smooth spiral arms. c. the Milky Way would be mor ...
... e. the stars in the spiral arms emit most of their energy at radio wavelengths. If the spiral density wave were the only thing producing spiral arms, it would be expected that a. all spiral arms would be dust free. b. all galaxies would have only two smooth spiral arms. c. the Milky Way would be mor ...
Lecture21 - Michigan State University
... cannot look far along the plane of the Galaxy However, one can see much farther if you look up through the dust instead of along the disk By looking out of the plane of the Galaxy, Shapley observed globular clusters in 1917 and their distances were measured using Cepheids and RR Lyrae stars Shapley ...
... cannot look far along the plane of the Galaxy However, one can see much farther if you look up through the dust instead of along the disk By looking out of the plane of the Galaxy, Shapley observed globular clusters in 1917 and their distances were measured using Cepheids and RR Lyrae stars Shapley ...
The Milky Way
... that has been ionized by young, massive, hot stars. Their light is highly red-shifted because especially the star-forming regions are moving away from us at high speed. This is the red color of interstellar dust that is present in the molecular clouds out of which stars are formed. Star forming regi ...
... that has been ionized by young, massive, hot stars. Their light is highly red-shifted because especially the star-forming regions are moving away from us at high speed. This is the red color of interstellar dust that is present in the molecular clouds out of which stars are formed. Star forming regi ...
![Gugus Bintang [Compatibility Mode]](http://s1.studyres.com/store/data/007745973_1-cdf92b37339f4354c66eef546bd46492-300x300.png)
Gugus Bintang [Compatibility Mode]
... stars), determine luminosity from the type, measure brightness, and then calculate distance. If the giant star is in a cluster, then we can determine the distance to the cluster by using several giant stars in the cluster to get its distance. 3. Cepheid Variables: By measuring the period of a cephei ...
... stars), determine luminosity from the type, measure brightness, and then calculate distance. If the giant star is in a cluster, then we can determine the distance to the cluster by using several giant stars in the cluster to get its distance. 3. Cepheid Variables: By measuring the period of a cephei ...
Galaxies - Stockton University
... In the Solar neighborhood, an average main-sequence star (excluding binary stars) is separated by of order 107 times its size from its nearest neighbors (1 Solar Radius vs. 1 pc). Galaxies on the other hand have sizes ranging from 1 to 100 Kpc, but are separated by of order 1 to 10 Mpc from their ne ...
... In the Solar neighborhood, an average main-sequence star (excluding binary stars) is separated by of order 107 times its size from its nearest neighbors (1 Solar Radius vs. 1 pc). Galaxies on the other hand have sizes ranging from 1 to 100 Kpc, but are separated by of order 1 to 10 Mpc from their ne ...
Coma Cluster of Galaxies Activity
... — the Magellanic Clouds and Andromeda — all the way out to the edge of the visible universe 13 billion light years away. Nobody knows for sure, but it is estimated that there are 100 billion galaxies or more in the visible universe, and many more beyond that. Galaxies live in a variety of environmen ...
... — the Magellanic Clouds and Andromeda — all the way out to the edge of the visible universe 13 billion light years away. Nobody knows for sure, but it is estimated that there are 100 billion galaxies or more in the visible universe, and many more beyond that. Galaxies live in a variety of environmen ...
The Collision Between The Milky Way And Andromeda
... is set to match distributions extracted from cosmological Nbody simulations (e.g., Navarro et al. 1996). Together, these models specify the total mass distribution out to the virial radius (∼ 200 − 300 kpc). In our model of the Local Group we start by adopting the models for the Milky Way and Androm ...
... is set to match distributions extracted from cosmological Nbody simulations (e.g., Navarro et al. 1996). Together, these models specify the total mass distribution out to the virial radius (∼ 200 − 300 kpc). In our model of the Local Group we start by adopting the models for the Milky Way and Androm ...
PEGASUS, THE FLYING HORSE Pegasus is a constellation in the
... with a redshift of 0.0027. It was discovered by musician-astronomer William Herschel in 1784 and was later one of the first nebulous objects to be described as "spiral" by William Parsons. Another of Pegasus's galaxies is NGC 7742, a Type 2 Seyfert galaxy. Located at a distance of 77 million light-y ...
... with a redshift of 0.0027. It was discovered by musician-astronomer William Herschel in 1784 and was later one of the first nebulous objects to be described as "spiral" by William Parsons. Another of Pegasus's galaxies is NGC 7742, a Type 2 Seyfert galaxy. Located at a distance of 77 million light-y ...
Family Space Day Overview – Galaxies
... there so many stars that are very distant; your eye cannot distinguish the stars as separate points of light. By using binoculars or a telescope, you can see the individual stars. The Milky Way is like a big, flat disk in space. We are looking into the wide part of the disk when we look at the band ...
... there so many stars that are very distant; your eye cannot distinguish the stars as separate points of light. By using binoculars or a telescope, you can see the individual stars. The Milky Way is like a big, flat disk in space. We are looking into the wide part of the disk when we look at the band ...
ch19
... We are located in the disk of our galaxy and this is why the disk appears as a band of stars across the sky. Early attempts to locate our solar system produced erroneous results. The main problem was that interstellar extinction allows one to only see the nearby stars and makes distant objects appea ...
... We are located in the disk of our galaxy and this is why the disk appears as a band of stars across the sky. Early attempts to locate our solar system produced erroneous results. The main problem was that interstellar extinction allows one to only see the nearby stars and makes distant objects appea ...
Our galaxy - School of Physics
... The Story of our Discovery of the Milky Way” by Leila Belkora (IoP, 2003). • The website of the UCLA Galactic Centre group is at http://www.galacticcenter.astro.ucla.edu/. It contains lots of interesting pictures and animations about the great work they are doing. • Scientific American had a cover s ...
... The Story of our Discovery of the Milky Way” by Leila Belkora (IoP, 2003). • The website of the UCLA Galactic Centre group is at http://www.galacticcenter.astro.ucla.edu/. It contains lots of interesting pictures and animations about the great work they are doing. • Scientific American had a cover s ...
SIMULATIONS
... IR-corrected far UV tracer of Hao + 11: FUV flux corrected using the total IR emission ...
... IR-corrected far UV tracer of Hao + 11: FUV flux corrected using the total IR emission ...
harvest09b - NMSU Astronomy
... (rest-frame velocity) Clear causal connection of “strong” CIV absorbers seen in QSO spectra with galaxies; I.e., C IV traces metal enriched gas in vicinity (80 kpc proper) of galaxies O VI absorption and z=3 galaxies For N(OVI) > 1013.5 cm-2, the OVI absorber temperatures, kinematics, and rate of ...
... (rest-frame velocity) Clear causal connection of “strong” CIV absorbers seen in QSO spectra with galaxies; I.e., C IV traces metal enriched gas in vicinity (80 kpc proper) of galaxies O VI absorption and z=3 galaxies For N(OVI) > 1013.5 cm-2, the OVI absorber temperatures, kinematics, and rate of ...
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.