This is the latest information letting you know,Milky way .
Circular disc containing large number of stars.
sun is at a distance of about 27,000 light year from the center.
Thickness of the disc at the center - 5000 light years
thickness of the disc at sun - 1000 light year.
It contains about 150 billion stars.
star moves at a speed of 250 km/s.
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