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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 .
Dos EPs is the first compilation album by the American stoner rock band Nebula. [9] [10] It was released on May 28, 2002, by MeteorCity, and later reissued in 2018 by the band's current label, Heavy Psych Sounds Records. [11] The album contains songs from the Nebula/Lowrider and Sun Creature EPs, as well as three new tracks.
From this work Sharpless published his catalog of H II regions in two editions: the first in 1953, with 142 nebula; [3] and the second and final edition in 1959, with 312 nebulae. [ 2 ] [ 4 ] Sharpless coordinates are based on the star catalogs Bonner Durchmusterung (BD) and Cordoba Durchmusterung (CD), but the second release was adjusted to ...
The mean expansion velocity of the nebula seems to be slow at 20 km/s at the outer layer, [7] while it also reaches a maximum expansion velocity of 60 km/s relative to its central star. [8] Its central star has a magnitude of around 14m [7] and a temperature of around 47,000--59 000 K. [9] The most characteristic feature of IC 4997 is its ...
The expansion rate of different portions of the nebula varies from 10 km/s to at least 30 km/s, leading to age estimates of 78,500 - 236,000 years. The nebula has been studied at radio and x-ray wavelengths, but it is still unclear whether it was produced at the class O main sequence stage of development, as a red supergiant , luminous blue ...
IC 11, Sh2-184, [3] Sharpless 184, [1] LBN 616, LBN 123.17-06.28, Pacman Nebula See also: Lists of nebulae NGC 281 , IC 11 or Sh2-184 is a bright emission nebula and part of an H II region in the northern constellation of Cassiopeia and is part of the Milky Way 's Perseus Spiral Arm .
IC 5146 (also Caldwell 19, Sh 2-125, Barnard 168, and the Cocoon Nebula) is a reflection [2] /emission [3] nebula and Caldwell object in the constellation Cygnus. The NGC description refers to IC 5146 as a cluster of 9.5 mag stars involved in a bright and dark nebula.
Emission nebula: IC 2944: 142 ly (44 pc) [56] [57] Emission nebula: Eagle Nebula: 140 ly (43 pc) [58] H II region: Part of another diffuse nebula IC 4703. Rosette Nebula: 130 ly (40 pc) [59] H II region: Only 36 stars were known to be in this nebula but the Chandra telescope increased the number of known stars to 160. Lagoon Nebula: 110 ly (34 ...