description NGC 7293 (Helix) Overview
NGC 7293, commonly called the Helix Nebula, is a planetary nebula in the constellation Aquarius. It consists of glowing gas expelled by a dying, low- or intermediate-mass star, whose remaining core is the central white dwarf. The Helix is a nearby and extensively observed example of this stage of stellar evolution, and its images show nested shells, ultraviolet emission, and dense cometary knots.
help NGC 7293 (Helix) FAQ
Why is NGC 7293 commonly called the Helix Nebula?
NGC 7293 is known as the Helix Nebula because its visual appearance resembles a cosmic eye or a sprawling helix spiral when viewed through telescopes. This shape is created by the dying central star shedding its outer gaseous layers into expanding shells.
How far away is the Helix Nebula from Earth?
The Helix Nebula is located approximately 650 light-years away, making it the closest planetary nebula to our planet. Its close proximity allows astronomers to study the intricate details of a dying star's gas envelope with great clarity.
Who discovered the Helix Nebula and when?
The Helix Nebula was discovered by German astronomer Karl Harding in the year 1824. Harding is also well known for discovering the large asteroid Juno a few years prior to this nebula sighting.
What type of celestial object is the Helix Nebula?
NGC 7293 is a vast planetary nebula located in the southern constellation of Aquarius. It represents the final, glowing stages of a dying sun-like star expelling its outer atmosphere into deep space.
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