Milky way
the milky way is the galaxy that contains our solar system.
it's barred spiral galaxy.
about 100,000 light years wide has 100 - 400 billion stars.
our solar system sits in the orion arm.
27000 - light years from the center.
at the center is a supermassive black hole called sagittariun A*it has bulge,spiral arms,and a halo of stars and dark matter.
it rotates, aned the sun takes about 225 million years to go around once.
in~4 - 5 billion years,it will collide with andromeda galaxy to form a new one.
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