4milkywaygalaxy

media type="custom" key="4610964" align="left"A MILKY WAY GALAXY



GENERAL OVER VIEW OF GALAXIES
 * 1) there are different types of galaxies: spiral,elliptical, and irregular

MILKY WAY GALAXY the milky way system is a spiral galaxy consisting of over 400 billion stars, plus gas and dust arranged into three general components as shown to the left: Like other spiral galaxies, the Milky Way has a bulg,a disk, and a halo. Although all are parts of the same galaxy,each contains different objects. The halo and central bulge contain old stars and the disk is filled with gas, dust, and young stars. Our Sun is itself a fairly young star at only 5 billion years old. The Milky Way galaxy is at least 5 billion years older than that.

The halo - a roughly spherical distribution which contains the oldest stars in the Galaxy,
 * The nuclear bulge and Galactic Center.
 * The disk, which contains the majority of the stars, including the sun, and virtually all of the gas and dust
 * 

__The Disk__ The disk of the Galaxy is a flattened, rotating system which contains the Sun and other intermediate-to-young stars. The sun sits about 2/3 of the way from the center to the edge of the disk. The sun revolves around the center of the galaxy about once every 250 million years. The disk also the galaxy about contains atomic (HI) and molecular (H2) gas and dust.



The Milky Way Galaxy- Our Home The Milky Way galaxy is the spiral galaxy we call home, as do roughly 100 billion other stars. It looks very much like other spiral galaxies when viewed from above. There are spiral arms and a bright central part. The Sun is far from the center of the Galaxy, halfway to the edge of the Galaxy along the Orion spiral arm. The Sun is revolving around the center of the Galaxy at a speed of half a million miles per hour, yet it will still take 200 million years for it to go around once. Do you feel like you are moving at that speed through space? If you did, you would certainly need a seat belt! When we run, we feel the wind on our bodies because there are molecules which make up the air that push against our bodies. But there are very few molecules in the space between the stars. So there is nothing to push against our planet so that we "feel" like we are rushing around at half a million miles per hour.



Quick Facts


 * galaxy m60 is one of the several gaint elliptical galaxies in the virgo galaxy cluster
 * objects in the universe-galaxies,stars,planets,nebulae-are scattered acvross three dimensions of space and one of time
 * andromeda galaxy is the closet major galaxy to the milky way
 * the solar system is a part of a vast collection of stars,gas anddust called the milky way galaxy, which has over 400 billion stars
 * Groups and clusters of may contain from ten to thousands of galaxies. The clusters themselves are often associated with larger groups called superclusters

 More Links to Milky Way Material
 * [|Milky Way Galaxy images from the Astronomical Picture of the Day] archives
 * [|Milky Way Wide-Angle Photos]
 * [|Multi Wavelength Images] of the Milky Way (Nasa ADC)
 * [|Milky Way page] of the MAP space observatory project
 * [|The Summer Milky Way from S.E. Arizona]
 * [|Milky Way panorama by Axel Mellinger]
 * [|The Milky Way Galaxy within 50,000 light years], [|A Map of the Milky Way], and [|The Milky Way's Satellite Galaxies], from An Atlas of the Universe
 * [|The Structure of the Milky Way Tutorial], Gene Smith
 * [|Yahoo's index of Milky Way webpages]
 * [|www.atlasoftheuniverse.com]
 * [|www.space.com/milkyway]

Bibliograpy > [|www.space.com/milkyway] 2. books = [|WWW.NASA.GOV]NASA NASA =
 * 1) internet
 * yahoo
 * universe
 * the universe