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Дата изменения: Wed Dec 3 12:21:59 2003
Дата индексирования: Tue Oct 2 17:44:55 2012
Кодировка:

Поисковые слова: shadow
Moonrise Through Mauna Keas <b style="color:black;background-color:#ffff66">Shadow</b>
Astronomy Picture of the Day
    


Moonrise Through Mauna Keas Shadow
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Moonrise Through Mauna Keas Shadow
Credit & Copyright: Michael Connelley (U. Hawaii)
Explanation: How can the Moon rise through a mountain? It cannot -- what was photographed here is a moonrise through the shadow of a large volcano. The volcano is Mauna Kea, Hawai'i, USA, a frequent spot for spectacular photographs since it is arguably the premier observing location on planet Earth. The Sun has just set in the opposite direction, behind the camera. Additionally, the Moon has just passed full phase -- were it precisely at full phase it would rise, possibly eclipsed, at the very peak of the shadow. Refraction of moonlight through the Earth's atmosphere makes the Moon appear slightly oval. Cinder cones from old volcanic eruptions are visible in the foreground. Cloud tops below Mauna Kea's summit have unusually flat tops, indicating a decrease in air moisture that frequently keeps the air unusually dry, another attribute of this stellar observing site.

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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.

Based on Astronomy Picture Of the Day

Publications with keywords: moonrise - Mauna Kea
Publications with words: moonrise - Mauna Kea
See also:
All publications on this topic >>