Astronomy Picture of the Day · October 21, 2021

SH2-308: The Dolphin-head Nebula

The Astronomy Picture of the Day for October 21, 2021 is “SH2-308: The Dolphin-head Nebula,” an image. The picture is copyrighted by its creator (Image Credit & Copyright: Nik Szymanek). The original explanation runs about 176 words.

From the explanation

“Blown by fast winds from a hot, massive star, this cosmic bubble is huge. Cataloged as Sharpless 2-308 it lies some 5,000 light-years away toward the constellation of the Big Dog ( Canis Major ) and covers slightly more of the sky than a Full Moon.”

— APOD editors, October 21, 2021

Read the full explanation on science.nasa.gov

At a glance

Date: October 21, 2021
Type: Image
Credit: Credit: Image Credit & Copyright: Nik Szymanek
Copyright: Copyrighted by the credited creator. Ask the copyright holder before reusing it.
Explanation length: About 176 words

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Topics in this entry

The Moon Nebulae

Topics are matched from words in the title and explanation.

On this day: October 21 in other years

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Source

Astronomy Picture of the Day, October 21, 2021 — science.nasa.gov/image-article/apod-2021-october-21-sharpless-308-the-dolphin-head-nebula

Copy taken Oct 28, 2026, 2:39 AM EDT. The image and explanation belong to their creators. OpenOrbit is not affiliated with or endorsed by NASA.