what is a super blue blood moon?
Answers
As it was also a blue moon, the second full moon in the calendar month of January 2018, it was referred to as a "super blue blood moon"; the term blood refers to the typical color of the Moon during a total lunar eclipse.This coincidence last occurred on December 30, 1982 for the eastern hemisphere,and otherwise before that on March 31, 1866.The next occurrence will be on January 31, 2037, one metonic cycle (19 years) later.
A supermoon is a moon that is full when it is at its closest point in an elliptical orbit around the Earth and a total lunar eclipse or blood moon in which Earth's shadow upon the lunar eclipse gives it a reddish colour.
When Earth's moon is in full eclipse then a "Blood Moon" occurs. Actually the super blue moon is the combination of blue moon, super moon and total eclipse, all the three are rare events. The striking feature of this Moon is that instead of white colour it becomes red or ruddy-brown. When the moon crosses into the shadow of the Earth it becomes blood red in colour.
Do you know that the term "blue moon" is used when the full moon appears twice in less than 28 days because moon takes approximately 27 days to orbit the earth. Therefore, we can say that blue moon happens on an average every three years.