Search results
Results From The WOW.Com Content Network
English: The Helix Nebula: a Gaseous Envelope Expelled By a Dying Star About the Object. Object Name: Helix Nebula, NGC 7293 or "The Eye of God" Object Description: Planetary Nebula; Position (J2000): R.A. 22h 29m 48.20s; Dec. -20° 49' 26.0" Constellation: Aquarius; Distance: About 690 light-years (213 parsecs)
Main page; Contents; Current events; Random article; About Wikipedia; Contact us
The central star of the Helix Nebula is a white dwarf of spectral type DAO. [19] It has the designations WD 2226-210, PHL 287, and GJ 9785. [ 1 ] The star has a radius of 0.025 solar radii (17,000 km), a mass of 0.678 M ☉ , a temperature of 120,000 Kelvin and has an apparent magnitude of 13.5.
Globules located far and close to the central star present different characteristics. On the near side of the Helix Nebula, the central dusty globule of each cometary knot appears dark against the background as it absorbs the [O III] 5007 Angstrom light emitted in the nebular envelope.
Diffuse Nebula: The closest major star formation region to Earth. [49] Crab Nebula: 11 ly (3.4 pc) [50] Supernova remnant: The remnant of a supernova that occurred in 1054 AD. [51] Bubble Nebula: 6 [52]-10 [53] [54] ly (1.84-3.066 pc) Emission nebula: Helix Nebula: 5.74 ly (1.76 pc) [55] Emission nebula: Eightburst Nebula: 0.8 ly (0.2453 pc ...
As we close in we can see the faint ring shape of the Helix Nebula (NGC 7293), one of the closest planetary nebulae to the Earth. In the final sequence we see a new image of the Helix taken in infrared light with the VISTA telescope at ESO's Paranal Observatory in Chile.
Cat's Eye Nebula: NGC 6543: 1786 3.3 ± 0.9 9.8B Draco: Little Ghost Nebula: NGC 6369: 1800 (prior to) 2 ± 3 9.9 Ophiuchus: Medusa Nebula: Abell 21 1955 1.0 (approx.) 15.99 Gemini: Jewel Bug Nebula: NGC 7027: 1878 3.0 (approx.) 10 Cygnus: Helix Nebula: NGC 7293: 1824 0.68 +0.15 −0.08: 7.6 Aquarius: Little Dumbbell Nebula: M76: NGC 650, NGC ...
The central star is a binary star consisting of an A-type subgiant and a subdwarf O star. [9] The system, which has an orbital period of 16.00 ± 0.03 days, [2] is also variable, [10] probably due to dust in orbit around it. The dust itself is heated by the central star and so NGC 2346 is unusually bright in the infrared part of the spectrum.