Q - What exactly is the Supermoon?This one snippet will serve to send you over to the site of the Beaker Folk to read the rest of the Q&A.
A - It's when the Moon suddenly becomes much larger than normal. This makes it considerably brighter and more massive.
Last night the moon was beautiful and appeared full, but I gather tonight is the night.
The photo is from NASA and was not taken tonight.
UPDATE: The supermoon was gorgeous here this evening.