Galaxy Galacy 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…
Category: Universe
What is Big Bang and what is Big Crunch? Will Big Crunch occur in future?
Big Bang Theory One of the most important theories about the beginning of the universe is the big-bang theory. The big-bang theory explains the formation of heavenly bodies such as galaxies, stars, and planets and many more. According to the big-bang theory, all the matter in the universe was originally concentrated in one vast lump…
What is Black Hole? How is it formed?
Black Hole – A black hole is an object with a stong gravitational field in which the light cannot pass through from its surface. A black hole may be formed when a massive object (very big object ) undergoes uncontrolled contraction (collapse) because of the inward pull of ots own gravity. Description of formation of…
What is Universe
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…
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