Our Universe : Based on the Big Bang Theory Our Universe age consider as 13.8 billion years. Process of the Universe , Universe---> Number of Galaxy->Number of Stars -> Planets. Name of the Galaxy is " Milky Way ". Study of Universe is " Cosmology ". Around 68% of the stars of the milky way are larger size in than the SUN. STARS: Stars contains spherical shape Sun contains around 1crore years it works nuclear chemical reaction. Small nuclides converts to bulky nuclides its forms nuclear fusion in the stars. When nuclear reaction completly stoped, then the stars can converts to block hole, Nuetrino stars, white dwarf. Block hole consider maximum gravity comparing with sun mass (2x10^30kg) its 1.4 times greater then so its converts into block holes. This limit proposed by Chandrashekar limit