The vast surrounding space is known as universe which contains the most distant stars, satellites, planets, galaxies and the earth where we live. There is no one knows how big the universe is or whether it has any limits. The universe contains millions of planets, stars and huge clouds of gas which is separated by…

Galaxy is coming from Greek word “galaxi” and is a vast collection of billions of stars, dust and hydrogen gas, isolated in space from similar systems. Galaxies are the building blocks of the universe. There are about 100 billion galaxies in the universe, and each galaxy has on an average 100 billion stars. The two…