This is the best summary I could come up with:

It’s February 2, and today’s image concerns an emission nebula about 5,000 light-years away in the Cygnus constellation.

Discovered more than 230 years ago by William Herschel, astronomers believe the Crescent Nebula is formed by the combination of an energetic stellar wind from a Wolf-Rayet star at its core, colliding with slower-moving material ejected earlier in the star’s lifetime.

This photo was captured by Ars reader 1Zach1 with an Astro-Tech AT80ED Refractor telescope.

It was the product of 11 hours of integration, or 228 exposures each lasting three minutes.

It was taken in rural southwestern Washington.

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