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Topic: Milky Way Galaxy

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  MSN Encarta - Milky Way
The name Milky Way is derived from Greek mythology, in which the band of light was said to be milk from the breast of the goddess Hera.
Astronomers have therefore speculated that the known Milky Way system is in turn surrounded by a much larger ring or halo of undetected matter known as dark matter.
The central Milky Way and the halo are largely composed of the type II population.
encarta.msn.com /encyclopedia_761558916/Milky_Way.html   (984 words)

 World Almanac for Kids
The individual stars that are distinct in the sky are those in the Milky Way galaxy that lie sufficiently close to the solar system to be discerned separately.
The Milky Way has been determined to be a large spiral galaxy, with several spiral arms coiling around a central bulge about 10,000 light-years thick.
The central Milky Way and the halo are composed of the type II population.
www.worldalmanacforkids.com /explore/space/milkyway.html   (630 words)

 Milky Way Galaxy
Milky Way is the galaxy of which the sun and solar system are a part.
The diameter of the Milky Way is around 100,000 light-years, its thickness is 10,000 light-years and is 30,000 light-years at the center.
The spiral arms and central plane of the Milky Way hold the interstellar gas, dust, and bright young stars called Population I. The halo, spaces between the spiral arms, and central core of the galaxy contain the older, less luminous stars that are called Population II.
www.mcwdn.org /SPACE/MilkyWay.html   (243 words)

 NRAO Glossary
Milky Way: Our Galaxy, of which the Sun is a member, seen by the naked eye as a luminous band across the sky.
One common way to describe the resolution of a telescope is to state the minimum angular separation at which a double star, whose two components are fairly bright and have very nearly the same brightness, can be distinguished as two separate stars.
Spiral Galaxy: A galaxy consisting of a flattened rotating disk of young stars, a central bulge of generally older stars, and a surrounding halo of older stars and dense clusters of old stars called globular clusters.
www.nrao.edu /imagegallery/glossary.shtml   (4257 words)

 The Milky Way Galaxy   (Site not responding. Last check: 2007-10-20)
We call this band the Milky Way; it is composed primarily of stars that are too faint to be resolved so that we see their combined light as a faint glow.
The Milky Way is an example of a gigantic collection of stars, gas, and dust that we call a galaxy.
Another spiral galaxy that is probably similar in appearance to the Milky Way is M83.
csep10.phys.utk.edu /astr162/lect/milkyway/milkyway.html   (229 words)

 Hide and seek: The nearest galaxy to the Milky Way is found sneaking up behind us | csmonitor.com
Galaxies come in many different shapes: some are spherical, some are sort of blobby and disorganized, and some are disk-shaped, with elegant spiral arms of young stars radiating out from their centers.
But the Milky Way, of course, is only one of countless billions of other galaxies that we know about, and astronomers recently got a pretty big surprise when they tried to figure out how the Milky Way fits into the larger scheme of things.
This galaxy was dubbed the Sagittarius Dwarf galaxy (as it, and the core of the Milky Way, lie in the constellation Sagittarius), and until recently, it held the record for the nearest galaxy, at about 70,000 light away.
www.csmonitor.com /2003/1202/p25s01-stss.html   (1612 words)

 The Milky way, our galaxy
Galileo was the first man to observe the Milky Way, but it was only at the end of 1700 that William Herschel discovered the disc structure of the Galaxy.
The Galaxy is composed of a central bulge, a disc, the spiral arms and the halo.
The analysis of the rotation curve of the Galaxy (that is the trend of the rotation speed of the stars, as a function of the distance from the galactic centre) demonstrated that, at large distances from its centre, such speed remains quite high, instead of decreasing as expected.
www.pd.astro.it /E-MOSTRA/NEW/A5005MWY.HTM   (951 words)

 The Milky Way   (Site not responding. Last check: 2007-10-20)
It is a fairly large spiral galaxy and it has three main components: a disk, in which the solar system resides, a central bulge at the core, and an all encompassing halo.
The disk of the Milky Way has four spiral arms and it is approximately 300pc thick and 30kpc in diameter.
The bulge, at the centre of the galaxy, is a flattened spheroid of dimension 1kpc by 6kpc.
www.damtp.cam.ac.uk /user/gr/public/gal_milky.html   (240 words)

 Structure and dynamics (from Milky Way Galaxy) --¬† Encyclop√¶dia Britannica
The Andromeda Galaxy is one of the few visible to the unaided eye, appearing as a milky blur.
The nuclear spectra of Seyfert galaxies show broad emission lines, which are indicative of a central concentration of hot gas that is expanding at speeds of up to thousands of kilometres per second.
Provides information on the Milky Way galaxy, spiral and elliptical galaxies, dark matter in the universe, galaxy clusters, and the formation of their large-scale structures.
www.britannica.com /eb/article-68078   (877 words)

 Chapter 16 The Milky Way Galaxy   (Site not responding. Last check: 2007-10-20)
The disk in the Milky Way is the flattened wheel of stars, gas, and dust outside the nucleus of spiral galaxy.
The nuclear bulge in the Milky Way is the central region of a spiral galaxy, containing mostly old Population I stars.
The halo in the Milky Way is the spherical region around a galaxy, not including the disk or the nucleus, containing globular clusters (Population II stars), some gas, a few stray stars, and an invisible form of matter.
www.efc.dcccd.edu /smpe/faculty/adjunct/chafey/chapter16.htm   (2763 words)

 The Milky Way Galaxy   (Site not responding. Last check: 2007-10-20)
Studies of the rotation of the Milky Way show that the halo dominates the mass of the galaxy, but the material is not visible, now called dark matter.
The bulge of the galaxy is slightly elongated in the direction of the Sun, which may be due to a bar.
The presence of very high velocities in the stars and gas near the center of the galaxy has suggested to astronomers for a long time that a massive fl hole might be present, providing a strong enough gravitational pull to keep the stars and gas in orbit.
cassfos02.ucsd.edu /public/tutorial/MW.html   (990 words)

 Chandra :: Resources :: Milky Way Galaxy
Schematic illustration of the Milky Way galaxy, showing the prominent spiral arms, the central galactic bulge, the location of the Sun, and selected X-ray sources.
Schematic of Milky Way showing the dark matter halo (gray), globular clusters (red circles), the thick disk (dark purple), the stellar disk (white), the stellar bulge (red-orange), and the central fl hole.
The Milky Way is not an island universe, but a member of a small cluster of galaxies called the Local Group.
chandra.harvard.edu /resources/illustrations/milkyWay.html   (313 words)

 Milky Way Galaxy
The Milky Way Galaxy is one of the hundreds of billions of galaxies in the universe.
The Galaxy M83, shown on the right, is similar in size and shape to the Milky Way Galaxy and appears differently depending upon the wavelength used to view it.
The Milky Way Galaxy is a spiral galaxies with
www.matter-antimatter.com /milky_way_galaxy.htm   (505 words)

 Our Milky Way Galaxy and its companions
Messier's catalog which are not galaxies on their own (the only possible exception may be M54 which may belong to SagDEG, a small galaxy which is currently in a close encounter with the Milky Way, and thus our closest known intergalactic neighbor).
As a galaxy, the Milky Way is actually a giant, as its mass is probably between 750 billion and one trillion solar masses, and its diameter is about 100,000 light years.
This dwarf galaxy remained undiscovered -- despite its enormous extent on the sky of 5 x 10 degrees -- because it can only be detected as a slight enhancement of the density of stars on the sky; the actual surface brightness of this galaxy is very low.
www.public.asu.edu /~rjansen/localgroup/localgroup.html   (2638 words)

Ancients imagined the faint band of light stretching across the heavens was a trail of milk left by a goddess who was nursing her baby.
Spiral Galaxy- A galaxy containing a flattened disk, which may have prominent arms and a large bulge at the center.
Milky Way Galaxy- the Milky Way is a gravitationally bound collection of roughly a hundred billion stars including the sun.
www.cst.cmich.edu /users/kiefe1we/trusz1da/pub_html/galaxy.htm   (739 words)

 The Milky Way Galaxy
The oldest stars (in the globular clusters) orbit the galaxy in elongated elliptical orbits.
The Milky Way is subdivided into a nuclear bulge, a disk, a halo, and a corona.
Milky Way was formed by collapse of large cloud of gas and dust.
physics.uoregon.edu /~jimbrau/astr123/Notes/Chapter23.html   (1245 words)

 Re: speed of milky way galaxy
The Milky Way Galaxy may actually be even larger than that.
If they are part of the Galaxy, then the Milky Way must be at least that large.
The Sun is orbiting around the center of the Milky Way Galaxy at a speed of 220 kilometers per second.
www.madsci.org /posts/archives/dec96/842373364.As.r.html   (291 words)

 The Milky Way Galaxy   (Site not responding. Last check: 2007-10-20)
The Milky Way is an island of stars, of which the Sun is one member.
Because we live inside the Milky Way, it is very hard for us to determine its shape and size.
The Milky Way is ~ 12-15 kpc in radius and the Sun is ~ 8.5 kpc from the center.
www.astro.wesleyan.edu /~anna/Astro211/0502e.html   (405 words)

 SPACE.com -- The Milky Way Galaxy Shreds a Star Cluster
They formed with the Milky Way but often orbit not in the main plane of the galaxy, where the Sun and most other stars reside, but in a vast and sparsely populated halo that surrounds the entire galaxy.
Stars on the near side of the cluster are pulled slightly closer to the center of the galaxy.
The Milky Way is also known to disrupt other galaxies, called dwarf galaxies, generating similar star streams as a smaller galaxy -- which originated somewhere else -- is swallowed whole.
www.space.com /scienceastronomy/astronomy/galaxy_shred_020603.html   (819 words)

 Natural History: Milky Way Mystery - galaxy observations
The word "galaxy" derives from the Greek gala (milk), and the designation "Milky Way," in fact, can refer either to that visible stretch of stars or to the overall stellar system, in much the same way that "New York" can mean either the city or the state.
As is the case with most astronomical phenomena, galaxies reveal entirely different aspects when we examine them in wavelengths of light that our eyes can't see--infrared or X rays, for instance.
The best time to see the Milky Way's galactic bulge is when the sky is very dark; around the time of the new Moon is a good bet for that.
www.findarticles.com /p/articles/mi_m1134/is_7_110/ai_78334677   (1410 words)

 Milky Way Galaxy   (Site not responding. Last check: 2007-10-20)
The Milky Way Galaxy (MWG or the Galaxy) is the galaxy we live in.
Nevertheless, in recent years we have learned a lot about the Galaxy, including the fact that it is a barred galaxy.
Previous dyanamical models of the Milky Way were unable to match the long duration wing of the microlensing event timescale distribution (ETD).
www.astro.washington.edu /debattis/research/milky.html   (496 words)

 Our Milky Way Galaxy   (Site not responding. Last check: 2007-10-20)
The center of the Milky Way is surrounded by a spherical halo of about 150 globular clusters.
The central region of the Galaxy contains old stars and little in the way of dust and gas; the disk of the galaxy contains gas, dust, younger stars with more complex chemical compositions, and active regions of star formation like the Orion nebula.
Our Galaxy is centered in a halo of nonluminous dark matter that may be ten times larger than the visible portion of the spiral disk.
www.concord-grove.org /education/milky-way.html   (324 words)

 Spaceflight Now | Breaking News | New map of Milky Way shows galaxy to be cannibal
Thousands of stars stripped from the nearby Sagittarius dwarf galaxy are streaming through our vicinity of the Milky Way galaxy, according to a new view of the local universe constructed by a team of astronomers from the University of Virginia and the University of Massachusetts.
In model images made to show the interaction in 3-D, available at http://www.astro.virginia.edu/~mfs4n/sgr/, the Milky Way appears as a flattened disk with spiral arms, while Sagittarius is visible as a long flourish of stars swirling first under and then over and onto the Milky Way disk.
Even the existence of Sagittarius was unknown until the heart of this nearest satellite galaxy of the Milky Way was discovered by a British team of astronomers in 1994.
spaceflightnow.com /news/n0309/25milkyway   (1439 words)

 Lecture 26: The Milky Way Galaxy   (Site not responding. Last check: 2007-10-20)
Galaxy derives from the Greek word galaktikos which means "milky white".
In the early 1920s Harlow Shapley deduced the correct size and shape of the Milky Way using variables in globular clusters.
In a galaxy like the Milky Way there will be a progression of star formation across the spiral arm.
instruct1.cit.cornell.edu /courses/astro101/lec26.htm   (604 words)

 Bathsheba Grossman - Galaxy Crystal
The Galaxy Crystal is a cosmic paperweight: an optically perfect glass block 3" square by 1 1/2" deep, laser etched with a 3D model of the Milky Way.
We can't see all of our own galaxy -- the core blocks our view of the other side -- but this is a well-researched model of how it must look like.
The galaxy ships with clear rubber feet, to avoid scratches on your desk or mantel.
www.bathsheba.com /crystalsci/galaxy   (267 words)

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