According to the Farmer's Almanac, native tribes gave it this name because it was the month that had the heaviest snowfall.
Astrologer Richard Nolle first defined the term supermoon in 1979 as he explained that the phenomenon 'is a new or full moon which occurs with the moon at or near (within 90 per cent of) its closest approach to Earth in a given orbit'.
Or, ya know, just take a peek out the window before you go to bed on Monday night.
Rao writes that most people won't be able to discern any apparent change in size or brightness of Tuesday's moon.
The Super Moon, dubbed the "Super Snow Moon" will be fully lit up at 3.53pm on Tuesday, February 19.
In contrast, when the moon is at its furthest point from the earth it is 405,500km away (253,000 miles).
A supermoon happens a handful of times a year, but it's not always at its closest point to the earth.
The supermoon will reach its peak Tuesday morning at 9:54 a.m. local time. For South Bend and surrounding areas, moonrise will be at roughly 5:19 p.m. ET on February 18th and 6:36 p.m. ET on February 19th.
This will still be spectacular as the distance between the Moon and Earth will still be very close at 224,173 miles or 360,772 km.
Okay, it's not really bigger or brighter. January's coincided with a total lunar eclipse-an event where the moon passes directly through Earth's shadow.
The next supermoon will take place on March 21, just four hours after the March equinox-when day and night are the same length, with days in the northern Hemisphere getting longer thereafter. The moon's diameter will appear to be about 14 percent greater than an average full moon, while its brightness is expected to be near 30 percent more than usual.