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Дата изменения: Thu May 26 10:37:58 2005
Дата индексирования: Tue Oct 2 18:52:44 2012
Кодировка:
A Beautiful Trifid
Astronomy Picture of the Day
    


A Beautiful Trifid
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A Beautiful Trifid
Credit & Copyright: Dean Jacobsen
Explanation: The beautiful Trifid Nebula (aka M20), a photogenic study in cosmic contrasts, lies about 5,000 light-years away toward the nebula rich constellation Sagittarius. A star forming region in the plane of our galaxy, the Trifid fittingly illustrates three basic types of astronomical nebulae; red emission nebulae dominated by light from hydrogen atoms, blue reflection nebulae produced by dust reflecting starlight, and dark absorption nebulae where dense dust clouds appear in silhouette. The bright red emission nebula, roughly separated into three parts by obscuring dust lanes, lends the Trifid its popular name. In this gorgeous wide view, the red emission region is also surrounded by the telltale blue haze of reflection nebulae. Light-year long pillars and jets sculpted by newborn stars - visible here below the center of the emission nebula - appear in Hubble Space Telescope close-up images of the region.

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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: M 20 - star formation - emission nebula - reflection nebula - dark nebula - Trifid nebula
Publications with words: M 20 - star formation - emission nebula - reflection nebula - dark nebula - Trifid nebula
See also:
All publications on this topic >>