The Milky Way Galaxy
The Milky Way Galaxy is so large
that since the creation of our solar system approximately 4.6 billion years
ago., it has only circled or orbited the center of the Milky Way about
twenty times. Our Solar system (the sun and its nine planets)
moves in an orbit around the center of the milky way at about 140 ,miles
per second, which means it takes the Sun about 230 million years to complete
one orbit.
As seen from earth, the Milky
Way looks like a giant frisbee that bulges in the center as it spins in
space. Out solar system is in the lower part of a trailing arm of
the Milky Way Galaxy, A spiral Galaxy with a span of about 100,000 light
years of nearly 600,000 trillion miles.
As least 100-200 billion stars
lie within the Milk Way which only a medium sized galaxy among trillions
of other galaxies.
The starts at the center of
the galaxy are very crowded together, and if the Earth were in this region
we would see millions of very bright stars, (many larger that our sun)
and it would never be dark.
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