NASA भी नहीं बचा सकता है पृथ्वी को इससे, Science Of Gamma Ray Burst and Supernova Blast

The five most powerful explosions of universe which can lead to catastrophic events on Earth. These are the Gamma Ray Burst, Supernovae, comets and Asteroids Impacts.

Sources - https://www.nasa.gov/topics/earth/features/2012-supernova.html
-http://iopscience.iop.org/article/10.1088/2041-8205/800/1/L17/meta

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