Helix Nebula [SEP] constellation
Helix Nebula
The Helix Nebula, also known as NGC 7293, is a planetary nebula (PN) located in the constellation Aquarius. Discovered by Karl Ludwig Harding, probably before 1824, this object is one of the closest to the Earth of all the bright planetary nebulae. The distance, measured by the "Gaia" mission, is 655±13 light-years. It is similar in appearance to the Cat's Eye Nebula and the Ring Nebula, whose size, age, and physical characteristics are similar to the Dumbbell Nebula
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- SEDS - The Helix Nebula (NGC 7293)
- NightSkyInfo – The Helix Nebula (NGC 7293)
- Snopes - Helix Eye of God - Urban Legend
- Helix Nebula (NGC 7293) at Constellation Guide