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Mona Evans
Mona Evans • 2 years ago

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 tends to absorb the red part of the light and reflect the blue. (Image: George Greany) ©Mona Evans, “Nebulae” www.bellaonline.c...