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Enormous Lyα nebula (ELAN) The nebula is associated with the galaxy overdensity BOSS1441, [7] which is a protocluster at z=2.3. The nebula represents the circumgalactic medium. Its emission is powered by starburst and an obscured AGN. One of the most extended ELAN discovered as of 2019. [8] NGC 262 Halo Cloud 1,300,000 ly (400,000 pc) [9] H I ...
NGC 2264 is the designation number of the New General Catalogue that identifies two astronomical objects as a single object: the Cone Nebula, and the Christmas Tree Cluster. Two other objects are within this designation but not officially included, the Snowflake Cluster , [ 3 ] [ 4 ] and the Fox Fur Nebula . [ 5 ]
Moon with 22° halo over New York City, USA on November 30, 2020, at 01:16:28 AM EST Halo around the sun in Glen Arbor, Michigan (May 28, 2024) 22° halo featuring a Parry arc and an upper tangent arc , with a 46° halo featuring a circumzenithal arc .
NGC 2020 is an HII Region surrounding the Wolf-Rayet star BAT99-59. [2] It is located in the Large Magellanic Cloud . The nebula was discovered on 30 December 1836 by polymath John Herschel . [ 3 ]
NGC 2359 (also known as Thor's Helmet) is an emission nebula [3] in the constellation Canis Major.The nebula is approximately 3,670 parsecs (11.96 thousand light years) away and 30 light-years in size.
(March 2020) This is a list of diffuse nebulae. Most nebulae are diffuse, ... IC 2631, reflection nebula in Chamaeleon; IC 4604; IC 4605; IC 5146; Sharpless 2-1;
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The nebula is known as S 142 in the 1959 Sharpless catalog (Sh2-142). [2] It is extremely difficult to observe visually, usually requiring very dark skies and an O-III filter. The NGC 7380 complex is located at a distance of approximately 8.5 kilolight-years from the Sun , in the Perseus Arm of the Milky Way .