APOD: 2009 November 15 - M57: The Ring Nebula
SOURCE: DIGG • 2009-11-15
TOPICS:
Planetary Nebulae • Messier Objects • Space Plasmas • Nebulae • Lyra Constellation • Ring Nebula • Nebula • Planetary Nebula • Environment
[66 diggs @ Space] It looks like a ring on the sky. Hundreds of years ago astronomers noticed a nebula with a most unusual shape. Now known as M57 or NGC 6720, the gas cloud became popularly known as the Ring Nebula. It is now known to be a planetary nebula, a gas c...
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