Explanation: Double, double toil and trouble; Fire burn, and cauldron bubble -- maybe Macbeth should have consulted the Witch Head Nebula. This suggestively shaped reflection nebula is associated with the bright star Rigel in the constellation Orion. More formally known as IC 2118, the Witch Head Nebula glows primarily by light reflected from Rigel, the bright star just left of center in the above image. Fine dust in the nebula reflects the light. The blue color is caused not only by Rigel's blue color but because the dust grains reflect blue light more efficiently than red. The same physical process causes Earth's daytime sky to appear blue, although the scatterers in Earth's atmosphere are molecules of nitrogen and oxygen. The nebula lies about 1000 light-years away.

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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.

Publikacii s klyuchevymi slovami: IC 2118 - Witch Head Nebula - reflection nebula - tumannost' Golova Ved'my Publikacii so slovami: IC 2118 - Witch Head Nebula - reflection nebula - tumannost' Golova Ved'my
Sm. takzhe: IC 348 i Barnard 3 Rigel' i tumannost' Golova Ved'my Prizraki v Kassiopee NGC 7023: tumannost' Iris Svet, temnota i pyl' Otrazheniya tumannosti Prizrak Prizraki γ Kassiopei Vse publikacii na tu zhe temu >>