A Supermoon is a full moon or a new moon that approximately coincides with the closest distance that the Moon reaches to Earth in its elliptic orbit, resulting in a larger-than-usual apparent size of the lunar disk as seen from Earth.
It sounds cool with the super in front, but it is not like Superman compared to man, as Randall made clear in 1394: Superm*n where he makes fun of the term. This is basically what he does everytime he mentions the term, as a supermoon is only about 7% brighter and a wee bit larger than a regular average full moon.
Here is a list with the comics referring to a supermoon.
Pages in category "Supermoon"
The following 5 pages are in this category, out of 5 total.