Helix Nebula

The Helix Nebula (also known as The Helix, NGC 7293, or Caldwell 63) is a large 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 estimated distance is about 215 parsecs or 700 light-years. It is similar in appearance to the Ring Nebula, whose size, age, and physical characteristics are similar to the Dumbbell Nebula, varying only in its relative proximity and the appearance from the equatorial viewing angle. The Helix has often been referred to as the Eye of God on the Internet, since about 2003.

Read more about Helix Nebula:  General Information, Structure

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USNOA2 0750-21400328 - Notable Features - Deep Sky Objects
... well-known planetary nebulae are also located in Aquarius the Saturn Nebula (NGC 7009), to the eastwest of μ Aquarii and the famous Helix Nebula (NGC 7293), southwest of δ Aquarii ... NGC 6781 is a planetary nebula with a magnitude of 11.0, 2500 light-years from Earth ... field the field is so rich that several stars appear superimposed on the nebula ...
Helix Nebula - Structure - Knots
... The Helix Nebula was the first planetary nebula discovered to contain cometary knots ... cometary knots estimated to be in the Helix Nebula ... The excitation temperature varies across the Helix nebula ...