• The stars having zero magnitude will be less bright than the stars having negative magnitudes.
• Those stars which are red in color will have less temperature than the stars having blue color.
• The galaxy count of our universe is 1011
• The weight of Milky Way galaxy is 100 times less than that of a supergiant star.
• Moon has no light of its own. It simply reflects the light which is incident by sun on its surface.