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Дата изменения: Tue Aug 28 22:49:50 2012
Дата индексирования: Fri Feb 28 08:21:25 2014
Кодировка:

Поисковые слова: rho ophiuchi
Colorful Clouds Near <b style="color:black;background-color:#ffff66">Rho</b> <b style="color:black;background-color:#66ffff">Ophiuchi</b>
Astronomy Picture of the Day
    


Colorful Clouds Near Rho Ophiuchi
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Colorful Clouds Near Rho Ophiuchi
Credit & Copyright: Tom O'Donoghue
Explanation: Why is the sky near Antares and Rho Ophiuchi so colorful? The colors result from a mixture of objects and processes. Fine dust illuminated from the front by starlight produces blue reflection nebulae. Gaseous clouds whose atoms are excited by ultraviolet starlight produce reddish emission nebulae. Backlit dust clouds block starlight and so appear dark. Antares, a red supergiant and one of the brighter stars in the night sky, lights up the yellow-red clouds on the lower center. Rho Ophiuchi lies at the center of the blue nebula near the top. The distant globular cluster M4 is visible just to the right of Antares, and to the lower left of the red cloud engulfing Sigma Scorpii. These star clouds are even more colorful than humans can see, emitting light across the electromagnetic spectrum.

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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: Antares - nebula
Publications with words: Antares - nebula
See also:
All publications on this topic >>