The Witch Head Nebula. It glows from light reflected from bright supergiant Rigel - Orion's left foot! Although Rigel is blue, the nebula is blue because the dust scatters blue light more efficiently than the longer wavelengths. (Image: George Greany) ©Mona Evans, “Nebulae” http://www.bellaonline.com/articles/art43407.asp

Nebula and Stars

The core of our galaxy, seen in infrared light by the Spitzer Space Telescope. Blue light is from stars, green light is from polycyclic carbon molecules, yellow and red light is from the thermal glow of warm dust. This image spans approximately 1000 light years by 1600 light years. The galactic core is 26000 light years away.

Blue Nebula. S)

NGC 6902: The Butterfly Nebula

Best astronomy images 2012: See the most beautiful images of the universe. - Slate Magazine

nebula...

The California nebula

Nebula

A pillar of gas in the Carina Nebula is bathed in the light of hot, massive stars. Photo of Carina Nebula Pillar. Poster on VintPrint.com.

Witch Head Nebula

Trifid Nebula. This nebula is in Sagittarius. Its name means ‘divided into three lobes.’ The object is an unusual combination of an open cluster of stars; an emission nebula; a reflection nebula and a dark nebula.

Orion, Rigel, blue super star lower right; Betelguese, red super star upper left. Beautiful skies.

2012 January 31 Helix Nebula... One of my favorites :)

A galaxy nebula.

Nebula

The Horsehead and the Flame Nebulas in the constellation Orion. space astronomy

Nebula

The Crab Nebula