Don't miss the last 'supermoon' of the year in tonight's sky
Dec 06 2017
Of course, the moon doesn't actually change size, but it appears to be larger because of how its orbit lines up with the Earth and sun.
A supermoon occurs when a full moon coincides with the point in orbit in which the moon is closest to Earth.
The full moons on January 1 and 31, 2018 will both also be Supermoons.
The moon will appear 30 percent brighter and 14 percent larger than normal, peaking in size at 1547 GMT on December 3. Since the Moon's orbital path is elliptical it is closest to Earth on one side and farthest from the other.
It appeared to be about 14 per cent larger than usual and shone 30 per cent brighter.
The supermoon rises behind the mountain range seen from Naypyitaw, Myanmar, Sunday, Dec. 3, 2017. The December Full Moon was also referred to as Long Nights Moon by some Native American tribes due to its occurrence near the winter solstice-the day which receives the least amount of sunlight.
Skygazers were treated to a spectacular supermoon on Sunday, Dec. 4.
The time between perigees (an anomalistic month, about 27.555 days) does not align very well with the time between full moons (a synodic month, about 29.531 days).
See you in January, Supermoon!
Nichols says that despite the difference between a regular full moon and a supermoon, it is not as grand as it appears.