Chandra Grahan or A lunar Eclipse happens when, the moon passes through the Shadow of Earth, or the Earths Umbra.
The beginning of the eclipse is marked by the slight darkening of moon By Earth’s Shadow. The Shadow then begins to cover the entire moon making it turn into Red- brown colour.
Indians witnessed the lunar eclipse on 31st January 2018. This Time the Lunar Eclipse was also a blue moon Lunar Eclipse. A rare coincidence also occurred during this lunar eclipse- since it was also a blue moon and second full moon in the month of January; it was Called the Second Blue Blood Moon day. Such a phenomenon, was last witnessed on 30th of December 1982, primarily taking place in the eastern Hemisphere, and similarly before on the 31 of March 1866. This phenomenon will again take place on 31st January 2037.
On Magh Purnima, The lunar eclipse is believed to be a divine combination. On this day, one should take bath and do charity with open heart. But those who give charity on Chandra Grahan should do it before 8 o clock in the morning.