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The Helix Nebula (also known as NGC 7293 or Caldwell 63) is a planetary nebula (PN) located in the constellation Aquarius. Discovered by Karl Ludwig Harding , most likely before 1824, this object is one of the closest of all the bright planetary nebulae to Earth. [ 3 ]
Helix Nebula: Planetary Nebula: 0.522 Aquarius: 7.3 C64 NGC 2362: Tau Canis Majoris Cluster: Open Cluster and Nebula: 5.1 Canis Major: 4.1 C65 NGC 253: Sculptor Galaxy: Spiral Galaxy: 9,800 Sculptor: 7.1 C66 NGC 5694 Globular Cluster: 113 Hydra: 10.2 C67 NGC 1097 Barred Spiral Galaxy: 47,000 Fornax: 9.3 C68 NGC 6729: R CrA Nebula: Nebula: 0.424 ...
appdia (optional) - the apparent diameter of the nebula, in degrees,minutes,seconds,milliseconds of arc; size_v – the apparent dimensions of the nebula; constellation – the constellation containing the nebula. Should be wikilinked. radius_ly (optional) – the radius of the nebula, in light years; radius_pc (optional) – the radius of the ...
Cone Nebula; Crescent Nebula; Double Helix Nebula; Eagle Nebula; Elephant's Trunk Nebula; Eta Carinae Nebula; Flame Nebula; Fish Head Nebula; Fly Nebula; Gum Nebula;
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Enormous Lyα nebula (ELAN) Four quasars embedded in the nebula. Likely progenitor of a massive galaxy cluster at z=2.05. Fabulous Nebula [13] 969,000 ly (297,000 pc) [14] Enormous Lyα nebula (ELAN) Also called SDSS J1020+1040 nebula, after the central quasar (aka 4C 10.29), located at z=3.164. Inspiraling material. [14]
NGC 2685 (also known as the Helix Galaxy) is a lenticular and polar ring Seyfert Type 2 galaxy in the constellation Ursa Major. Its velocity with respect to the cosmic microwave background is 1003 ± 9 km/s, which corresponds to a Hubble distance of 48.2 ± 3.4 Mly (14.79 ± 1.05 Mpc ). [ 1 ]
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