Chandra Grahanam or lunar eclipse is a natural phenomenon and is one of the wonders of astronomy in which moon is shadowed partially or completely for a brief period of time.

Chandra Grahanam is caused when the earth comes in between moon and the sun. We do know that moon does not have a light of its own and it just reflects the light rays of the sun. Under a typical kind of alignment of the sun, moon and the earth on a full moon day, the earth hinders the sun’s rays falling on the moon and a shadow is caused on the moon. Thus, what we call as Chandra Grahanam is the shadow of the earth on the moon.

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