May 25

The Crescent Nebula

Like the Bubble Nebula, and Thor’s Helmet, this is formed by the fast stellar wind of the extremely hot star at its heart – which interacts in complex ways from the wind left over from when this star was a red giant. This is roughly 5,000 light-years away. Imaged in narrowband

Crescent Nebula NGC 6888
Crescent Nebula NGC 6888

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