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- Crab_Nebula abstract "The Crab Nebula (catalogue designations M1, NGC 1952, Taurus A) is a supernova remnant and pulsar wind nebula in the constellation of Taurus. It is not, as its name might suggest, in Cancer. The now-current name is due to William Parsons, 3rd Earl of Rosse, who observed the object in 1840 using a 36-inch telescope and produced a drawing that looked somewhat like a crab. Corresponding to a bright supernova recorded by Chinese astronomers in 1054, the nebula was observed later by English astronomer John Bevis in 1731. The nebula was the first astronomical object identified with a historical supernova explosion.At an apparent magnitude of 8.4, comparable to that of Saturn's moon Titan, it is not visible to the naked eye but can be made out using binoculars under favourable conditions. The nebula lies in the Perseus Arm of the Milky Way galaxy, at a distance of about 2.0 kiloparsecs (6,500 ly) from Earth. It has a diameter of 3.4 parsecs (11 ly), corresponding to an apparent diameter of some 7 arcminutes, and is expanding at a rate of about 1,500 kilometres per second (930 mi/s), or 0.5% c.At the center of the nebula lies the Crab Pulsar, a neutron star 28–30 kilometres (17–19 mi) across with a spin rate of 30.2 times per second, which emits pulses of radiation from gamma rays to radio waves. At X-ray and gamma ray energies above 30 keV, the Crab is generally the strongest persistent source in the sky, with measured flux extending to above 10 TeV. The nebula's radiation allows for the detailed studying of celestial bodies that occult it. In the 1950s and 1960s, the Sun's corona was mapped from observations of the Crab's radio waves passing through it, and in 2003, the thickness of the atmosphere of Saturn's moon Titan was measured as it blocked out X-rays from the nebula.".
- Crab_Nebula thumbnail Crab_Nebula.jpg?width=300.
- Crab_Nebula wikiPageExternalLink m001.html.
- Crab_Nebula wikiPageExternalLink crab.html.
- Crab_Nebula wikiPageExternalLink snrs.G184.6-5.8.html.
- Crab_Nebula wikiPageExternalLink ?search=crab+nebula.
- Crab_Nebula wikiPageID "82780".
- Crab_Nebula wikiPageLength "41587".
- Crab_Nebula wikiPageOutDegree "170".
- Crab_Nebula wikiPageRevisionID "701239266".
- Crab_Nebula wikiPageWikiLink 3C_58.
- Crab_Nebula wikiPageWikiLink Alexis_Clairaut.
- Crab_Nebula wikiPageWikiLink Angular_resolution.
- Crab_Nebula wikiPageWikiLink Apparent_magnitude.
- Crab_Nebula wikiPageWikiLink Astrophotography.
- Crab_Nebula wikiPageWikiLink Asymptotic_giant_branch.
- Crab_Nebula wikiPageWikiLink Binoculars.
- Crab_Nebula wikiPageWikiLink Birr_Castle.
- Crab_Nebula wikiPageWikiLink Cancer_(constellation).
- Crab_Nebula wikiPageWikiLink Carbon.
- Crab_Nebula wikiPageWikiLink Carl_Otto_Lampland.
- Crab_Nebula wikiPageWikiLink Category:Articles_containing_video_clips.
- Crab_Nebula wikiPageWikiLink Category:Astronomical_objects_discovered_in_1731.
- Crab_Nebula wikiPageWikiLink Category:Crab_Nebula.
- Crab_Nebula wikiPageWikiLink Category:Messier_objects.
- Crab_Nebula wikiPageWikiLink Category:NGC_objects.
- Crab_Nebula wikiPageWikiLink Category:Perseus_Arm.
- Crab_Nebula wikiPageWikiLink Category:Pulsar_wind_nebulae.
- Crab_Nebula wikiPageWikiLink Category:Sharpless_objects.
- Crab_Nebula wikiPageWikiLink Category:Supernova_remnants.
- Crab_Nebula wikiPageWikiLink Category:Taurus_(constellation).
- Crab_Nebula wikiPageWikiLink Chandra_X-ray_Observatory.
- Crab_Nebula wikiPageWikiLink Chandrasekhar_limit.
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- Crab_Nebula wikiPageWikiLink Comet.
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- Crab_Nebula wikiPageWikiLink Distance_modulus.
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- Crab_Nebula wikiPageWikiLink Electron.
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- Crab_Nebula wikiPageWikiLink Epoch_(astronomy).
- Crab_Nebula wikiPageWikiLink File:Crab_Nebula.jpg.
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- Crab_Nebula wikiPageWikiLink Fujiwara_no_Teika.
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- Crab_Nebula wikiPageWikiLink Gamma_ray.
- Crab_Nebula wikiPageWikiLink Guest_star_(astronomy).
- Crab_Nebula wikiPageWikiLink Halleys_Comet.
- Crab_Nebula wikiPageWikiLink Helium.
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- Crab_Nebula wikiPageWikiLink Hydrogen.
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- Crab_Nebula wikiPageWikiLink Ibn_Butlan.
- Crab_Nebula wikiPageWikiLink Infrared_astronomy.
- Crab_Nebula wikiPageWikiLink Ionization.
- Crab_Nebula wikiPageWikiLink Iosif_Shklovsky.
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- Crab_Nebula wikiPageWikiLink Light.
- Crab_Nebula wikiPageWikiLink List_of_most_massive_stars.
- Crab_Nebula wikiPageWikiLink Lists_of_nebulae.
- Crab_Nebula wikiPageWikiLink Luminosity.
- Crab_Nebula wikiPageWikiLink Magnetic_field.
- Crab_Nebula wikiPageWikiLink Majoidea.
- Crab_Nebula wikiPageWikiLink Mass.
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- Crab_Nebula wikiPageWikiLink Milky_Way.
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- Crab_Nebula wikiPageWikiLink Minute_and_second_of_arc.
- Crab_Nebula wikiPageWikiLink Moon.
- Crab_Nebula wikiPageWikiLink Naked_eye.
- Crab_Nebula wikiPageWikiLink Nebula.
- Crab_Nebula wikiPageWikiLink Nebulae_in_fiction.
- Crab_Nebula wikiPageWikiLink Neon.
- Crab_Nebula wikiPageWikiLink Nestorianism.
- Crab_Nebula wikiPageWikiLink Neutron_star.
- Crab_Nebula wikiPageWikiLink New_General_Catalogue.
- Crab_Nebula wikiPageWikiLink Nicholas_Mayall.
- Crab_Nebula wikiPageWikiLink Nicole-Reine_Lepaute.
- Crab_Nebula wikiPageWikiLink Nitrogen.
- Crab_Nebula wikiPageWikiLink Nuclear_fusion.
- Crab_Nebula wikiPageWikiLink Occultation.
- Crab_Nebula wikiPageWikiLink Optical_pulsar.
- Crab_Nebula wikiPageWikiLink Oval.
- Crab_Nebula wikiPageWikiLink Oxygen.
- Crab_Nebula wikiPageWikiLink Perseus_Arm.
- Crab_Nebula wikiPageWikiLink Photon_energy.