Explanation: What was so super about Wednesday's supermoon? Last week, a full moon occurred that appeared slightly larger and brighter than usual. The reason is that the Moon's fully illuminated phase occurred within a short time from perigee - when the Moon was its closest to the Earth in its elliptical orbit. Although the precise conditions that define a supermoon vary, last Wednesday's supermoon was surely the closest, largest, and brightest full moon this year. One reason supermoons are popular is because they are so easy to see -- just go outside at sunset and watch an impressive full moon rise! Pictured here, Wednesday's supermoon is compared to April's micro moon -- when a full Moon occurs near the furthest part of the Moon's orbit -- so that it appears slightly smaller and dimmer than usual. Given many definitions, at least one supermoon occurs each year, with another one coming next month (moon-th).

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Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (USRA)
NASA Web Site Statements, Warnings, and Disclaimers
NASA Official: Jay Norris. Specific rights apply.
A service of: LHEA at NASA / GSFC
& Michigan Tech. U.

Публикации с ключевыми словами: full moon Публикации со словами: full moon
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