Question

what is the big bang theory?

Answer 1

Hello there!
  mudit11 here to help._____________________________

□ The Big Bang is one of the most controversial concept in astronomy.

□ Big bang theory is the name of explosion between various gases that took place to form and make the present universe.

□ Big Bang theory holds that our universe began 13.7 billion years ago.

□ Today we know that universe has no center or edge, and every part of the cosmos is still expanding. 

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I hope this helps you.

Answer 2

Hi friend,

Big bang theory :

→ The big bang theory was proposed by Abbe Lemaitre.

→ According to this theory the universe has originated about 20billion years ago because of the thermonuclear entity.
This huge and single explosion that is almost unimaginable in physical terms is known as Big Bang.

→ What happened actually is that the universe has expanded and hence the temperature came down↓

→ The gaseous clouds formed by big bang condensed under the gravitation and was converted into many flat discs - like structures called NEBULA, which is made up of atoms and small particles.SOLAR NEBULA was the one that formed our solar system.

→ And the very hot centre part of the solar nebula became even more hotter than before and hence got converted into the sun.

→ But later on because of the condensation process of the atoms and also of the dust particles moving around the sun, became the reason for the formation of the planets.

→ There doesn't existed any atmosphere on earth earlier.It was formed later.

That's all about Big bang theory!