India joined the rest of the world in witnessing the supermoon on Tuesday night, the first of the two this month. Explaining the phenomenon, astrophysicist Debiprosad Duari said the moon goes around the Earth once in 27.3 days in an elliptic orbit. As a result, at some point in its orbit, it will be farthest from the Earth, the distant point being called the apogee, and at