Today we can witness a rare pink supermoon while staying at home. In India, it will be seen from evening April 7 to the morning of April 8. A supermoon is when the moon is in its full moon phase and is at the closest distance to earth. The orbit the earth in an ellipse than a perfect circle. So there are points on the earth which makes the moon farther away (apogee) and close to (perigee) the earth. When the moon is in its perigee it is about 363,300 kilometers from Earth the closest it can get and therefore appears bigger. Normally, a full moon can occur at any point along the orbit, supermoons occur only when the full moon is at the perigee.