Basic Astronomy

Cosmology


Cosmology is study of Universe in general. Formation, structure and evolution of Universe come under domain of Cosmology.

Edwin HubbleEinstein
(Left: Edwin Hubble. Right: Albert Einstein)

Modern Cosmology began in 1917 with publication of Einstein on General Relativity that described gravity as a curvature of space and time.

Though there are different cosmology theories, present theoretical understandings and observational evidences says the Universe started with a Big Bang roughly about 13.5-13.9 billion years ago and after the bang the Universe is continuing expansion.






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