The last full moon of 2017 will be the first, last and only supermoon of the year that can be seen with the naked eye.
A supermoon occurs when the full moon is at its closest distance to earth, a point which is called the perigree. Supermoons can appear up to 14% larger and 30% brighter than a full moon at its furthest distance from earth.
This December's supermoon made its appearance Sunday at 11.57pm. However, this supermoon kicks off a "trilogy" of supermoon appearances, the next ones calculated to emerge on Jan 1 and 31, 2018.
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