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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”

from Laughing Squid

A Stellar NASA Animation Zooms Into the Hubble Telescope’s View of the Bubble Nebula

Weltraumteleskop fängt riesigen Blasennebel ein (Video) | PRAVDA TV – Lebe die Rebellion

See Explanation. Clicking on the picture will download the highest resolution version available.

Comet West 1976 was a spectacular comet, sometimes considered to qualify for the status of "great comet".