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The Milkyway galaxy

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landon higgins

on 12 April 2011

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Transcript of The Milkyway galaxy

Double click anywhere & add an idea Milkyway Galaxy The stellar disk of the Milky Way galaxy is approximately 100,000 light years in diameter. The Milky Way is a large galaxy comprising an estimated 200 billion stars (some estimates range as high as 400 billion) arrayed in the form of a disk, with a central elliptical bulge (some 12,000 light years in diameter) of closely packed stars lying in the direction of Sagittarius. It is surrounded by a flat disk marked by six spiral arms, four major and two minor, which wind out from the nucleus like a giant pinwheel. Because of these arms, the Milky Way was classified as a spiral galaxy. However, increasing evidence indicates that the Milky Way probably has a bar or bar like structure of new, bright stars in its central region. This would modify its classification to a barred spiral or an intermediate type between barred and "normal" spiral. Our sun is situated in one of the smaller arms, called the Local or Orion Arm, that connect the more substantial next inner arm and the next outer arm. The sun lies roughly two thirds of the way from the center of the disk, which is some 28,000 light years distant, and in the galactic plane. When we look in the plane of the disk we see the combined light of its stars as the Milky Way. Milkyway Galaxy This map shows the full extent of the Milky Way galaxy - a spiral galaxy of at least two hundred billion stars. Our Sun is buried deep within the Orion Arm about 26 000 light years from the centre. Towards the centre of the Galaxy the stars are packed together much closer than they are where we live. Notice also the presence of small globular clusters of stars which lie well outside the plane of the Galaxy, and notice too the presence of a nearby dwarf galaxy - the Sagittarius dwarf - which is slowly being swallowed up by our own galaxy. The Milky Way is 100,000 light years in diameter.The earth is within the Milky Way, not away from it, so our solar system is 25,000 light years away from the center of the galaxy.Compared to the earth it is a tiny grain of sand with all of the billions of stars and planets. Our galaxy affects other objects such as the galaxy closest to us, Andromeda. The Milky Way and Andromeda are close enough together to have a gravitational pull. When Adromeda starts to get closer we will be able to see it in our night sky more clearly. When the two galaxies collide it will transform our galaxy in so many ways, hurling toward us at 300,000 miles an hour, the impact will be huge. You might know that the Milky Way is a spiral galaxy, perhaps the most beautiful galaxy type. But you can know lot about them. They have a majestic arms sweeping out from a central hub or bulge of glowing stars. A lot of spirals have a weird feature: a rectangular block of stars at the center instead of a sphere, and the arms radiate away from the ends of the block. Astronomers call this block a bar, and, we have one. The importance about the Milky Way galaxy is that we revolve around it. Perhaps the Milky Way galaxy not being a conveinently place as it. We might not exsist. It holds us in the perfest spot to have life. http://www.allbestwallpapers.com/space-nasa_-_the_andromeda_galaxy ,_m31,_spyral_galaxy_wallpapaers.html



http://www.answers.com/topic/milky way-galaxy-1 By Landon and Haley
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