Monday, June 11, 2012
A trail in the sky of the Milky Way
On top of plain night we can see a colorless group cross-ways the sky from side to side, with many stars. This is only a small part of our neighbors. Mutually we structure the Milky Way. The Romans called "Milk Road" which means it is Milky Way in Latin.
The Milky Way of our galaxy
Our galaxies the solar system is one of the twisting weapons, about 30,000 light years from the center and about 20,000 from the end.The Milky Way is a large galaxy, spiral and may have some 100,000 million stars, including the Sun In total some 100,000 light years wide in diameter and has a mass of more than two billion times the Sun every 225 million years ago the solar system completes a rotation around the center of the galaxy. It moves about 270 km. per second. We cannot see the bright center stand for solid materials, cosmic dust and cold gas, which stop light. It’s believed to contain a powerful black hole. The Milky Way is shaped like a convex lens. The core has central elliptical and about 8,000 light-years across. The core stars are closer together than those of the arms. It is surrounded by a cloud of hydrogen, some stars and star clusters.
The Milky Way is the part of Local Group
Next to with the Andromeda galaxy (M31) and Triangle (M33), the Magellanic Clouds (satellites of the Milky Way), the galaxies M32 and M110 (satellites of Andromeda), smaller galaxies and nebulae and other smaller systems are a group linked by gravity. In total there are 30 galaxies that occupy an area of about 4 million light years across. All goop orbits the large Virgo cluster of galaxies, about 50 million light years.
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