BLACK SKY:

This galaxy, a band of light seen in the night sky formed from star. the milky way appears as a band because its dark shape structure. The milky way contained all the star in the universe. The number of star, estimate 100- 400 billion. The sun's distance to galactic center is 8.09 upto 0.31 kpc and the speed relative to CBM rest frame 631 upto 20 km\sec . the dark matter density at sun's position is 0.0088 or 0.35 GeG cm.

The milky way in diameter between 100000 and 180000 light years. There are probably atleast 100 billion planets in the milky way.