We get a supermoon when the moon is full or almost full and also at its closest point to Earth along its slightly elliptical orbit. 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.
It happens when the moon's orbit brings it closest to the Earth (its perigee) and that coincides with the lunar cycle's full moon. The distance will be 221,681 miles. This will also be the last remaining supermoon of 2019 with the next one not occurring until March 9, 2020.
The biggest and brightest full moon of the year is coming to a sky near you on Tuesday.
Following this supermoon there will be one more on 21 March, after which you'll need to wait until early 2020 when the moon is once again closer to earth.
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"When it is full, the Moon is necessarily opposite the Sun in the sky, and therefore reaches its highest point in the sky at local midnight".
This type of moon can also be called a "hunger moon" as it traditionally comes at the end of winter when hunting was harder, making food scarce. During this time it'll appear very large to the eyes, which is an optical illusion.
The Old Farmer's Almanac notes that the Wishram people of the Pacific Northwest referred to the Snow Moon as "Shoulder to Shoulder Around the Fire Moon", and that the Cherokee people of the Southeast referred to it as the "Bone Moon". The full moon names corresponded with seasonal changes.
July 16: A partial lunar eclipse will be visible to people in much of Europe, Asia, and in regions of North and South America as well.