Super Moon

The super large full Moon on March 19 was a natural result of the elliptical orbit of the Moon and its monthly rotation, which occurs about every 18 years.

The March full Moon coincided closely with the closest approach of the Moon to the Earth in its elliptical orbit (perigee), resulting in a significantly larger and brighter full Moon in the sky. The Moon's elliptical orbit around the Earth creates a varying distance between 94% (perigee) and 106% (apogee) of its semi-major axis. Once a month the Moon will reach the perigee point, but normally this will not coincide with the full Moon. The coincidence of full Moon at perigee occurs every 18 years or so. Normally, when the Moon passes through the perigee point it is in a random phase, only being in the full Moon phase every 18 years or so. Perigee full Moons are about 14% wider and about 30% brighter than the smallest (at apogee) full Moons. Read more:
http://science.nasa.gov/science-news/science-at-nasa/2011/16mar_supermoon/