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Last updated on April 18, 2014 at 7:23 EDT
The Helix Nebula NGC7293
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The Helix Nebula, NGC7293

February 22, 2005
The Helix Nebula, NGC7293

The Helix Nebula, NGC7293, in the constellation Aquarius, as seen by the Kitt Peak 4-meter Mayall telescope in 1973. NGC7293 is about a light-year across and, at a distance of about 500 light-years, it is the closest known planetary nebula. North is at the top.