Stars

Stars are the heavenly bodies make up of hot burning gases and they shine by emitting their own light. 

Black Hole Stars

Stars having mass greater than three times that of the sun, have very gravitational power, so that not even light can escape from its gravity and hence called black hole.

The Big Bang Theory

Big Bang was an explosion of concentrated matter in the universe that occurred 15 billion years ago, leading to the formation of galaxies of stars and other hevenly bodies.

Galaxy

A galaxy is a vast system of billions of stars, dust and light gases bound by their own gravity.

• There are 100 billion galaxies in the universe and each galaxy has, on average, 100 billion stars.

• Our galaxy is Milky Way Galaxy (or Aakash Ganga) formed after the Big Bang.

• Andromeda is the nearest galaxy to the Milky Way.

• Latest known galaxy is Dwarf Galaxy.

Universe

The study of universe is known as Cosmology.

The universe is commonly defined as the totality of everything that exists including all physical matter and energy, the planets, stars, galaxies and the contents of intergalactic space.