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Explanation: What happens when a star runs out of nuclear fuel? The center condenses into a white dwarf while the outer atmospheric layers are expelled into space and appear as a planetary nebula. This particular planetary nebula, designated Shapley 1 after the famous astronomer Harlow Shapley, has a very apparent annular ring like structure. Although some of these nebulae appear like planets on the sky (hence their name), they actually surround stars far outside our Solar System.
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NASA Web Site Statements, Warnings, and Disclaimers
NASA Official: Jay Norris. Specific rights apply.
A service of: LHEA at NASA / GSFC
& Michigan Tech. U.
Based on Astronomy Picture
Of the Day
Publications with keywords: nebula - annular - planetary nebula - Shapley 1
Publications with words: nebula - annular - planetary nebula - Shapley 1
See also:
- APOD: 2025 June 9 Á Between Scylla and Charybdis: A Double Cosmic Discovery
- APOD: 2025 May 14 Á NGC 1360: The Robins Egg Nebula
- APOD: 2025 April 27 Á IC 418: The Spirograph Nebula
- APOD: 2025 April 15 Á Planetary Nebula NGC 1514 from Webb
- APOD: 2025 March 18 Á LDN 1235: The Shark Nebula
- Planetary Nebula Abell 7
- The Medusa Nebula