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Birthday · November 20, 2023

The Horsehead Nebula

November 20, 2023

The cosmos has been expanding since the beginning of time, making room for galaxies, for stars, for planets — and ultimately, for you.

The Horsehead Nebula

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APOD published November 20, 2023. Credit: Mark Hanson & Martin Pugh, SSRO, PROMPT, CTIO, NSF. A publication-date match, not a photo taken on your date. Independent of NASA.

Behind the image

The Horsehead Nebula

Original APOD · November 20, 2023

Sculpted by stellar winds and radiation, a magnificent interstellar dust cloud by chance has assumed this recognizable shape. Fittingly named the Horsehead Nebula, it is some 1,500 light-years distant, embedded in the vast Orion cloud complex. About five light-years "tall," the dark cloud is cataloged as Barnard 33 and is visible only because its obscuring dust is silhouetted against the glowing red emission nebula IC 434. Stars are forming within the dark cloud. Contrasting blue reflection nebula NGC 2023, surrounding a hot, young star, is at the lower left of the full image. The featured gorgeous color image combines both narrowband and broadband images recorded using several different telescopes. New: Follow APOD on Telegram

Image credit: Mark Hanson & Martin Pugh, SSRO, PROMPT, CTIO, NSF

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