Astronomical Journal. 123 (5): 2627–2657. Bibcode:2002AJ....123.2627B. doi:10.1086/339837. ISSN 0004-6256. Media related to NGC 1999 at Wikimedia Commons Andrew...
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cloud 3 (OMC-3) Orion molecular cloud 4 (OMC-4) NGC 1981 NGC 1999 the Waterfall nebula (HH-222), above NGC 1999 HH 34 a Herbig–Haro object with symmetric...
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distance of about 1343 light-years (412 parsec) in the constellation Orion near NGC 1999. HH 1/2 are among the brightest Herbig-Haro objects in the sky and consist...
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NGC 2803, also known as PCG 26181, is an elliptical or lenticular galaxy in the zodiac constellation Cancer. It was discovered March 21, 1784, by William...
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NGC 1267 is an elliptical galaxy located about 220 million light-years away in the constellation Perseus. NGC 1267 was discovered by astronomer Heinrich...
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NGC 2903 is an isolated barred spiral galaxy in the equatorial constellation of Leo, positioned about 1.5° due south of Lambda Leonis. It was discovered...
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NGC 2800, also known as PGC 26302, is an elliptical galaxy in the constellation Ursa Major. It was discovered February 17, 1831 by William Herschel. Skrutskie...
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NGC 2950 is a lenticular galaxy in the northern constellation of Ursa Major, about 50 million light years from the Milky Way and receding with a heliocentric...
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NGC 2509 is an open cluster in the constellation of Puppis. It was discovered on 3 December 1783 by William Herschel. It was described as "bright, pretty...
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Pre-main-sequence Stars". The Astrophysical Journal Supplement. 208 (1). 9. arXiv:1307.2657. Bibcode:2013ApJS..208....9P. doi:10.1088/0067-0049/208/1/9. S2CID 119308564...
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Pre-main-sequence Stars". The Astrophysical Journal Supplement. 208 (1): 22. arXiv:1307.2657. Bibcode:2013ApJS..208....9P. doi:10.1088/0067-0049/208/1/9. S2CID 119308564...
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