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The Boomerang Nebula is a protoplanetary nebula [2] located 5,000 light-years from Earth in the constellation Centaurus. It is also known as the Bow Tie Nebula and catalogued as LEDA 3074547. [ 3 ] The nebula's temperature is measured at 1 K (−272.15 °C ; −457.87 °F ) making it the coolest natural place currently known in the Universe .
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. This 20×30 arcmin sized nebulosity is also associated with open cluster IC 1590 , several Bok globules and the multiple star, B 1.
NGC 7027 has a rich and highly ionized spectrum caused by its hot central star. [7] The progenitor star of NGC 7027 is believed to have been about 3 to 4 times the mass of the Sun before the nebula was formed. [7] It is possible that the central white dwarf of NGC 7027 has an accretion disk that acts as a source of high temperatures. [24]
A nebula that is visible to the human eye from Earth would appear larger, but no brighter, from close by. [6] The Orion Nebula, the brightest nebula in the sky and occupying an area twice the angular diameter of the full Moon, can be viewed with the naked eye but was missed by early astronomers. [7]
emission line nebula The size is likely larger. The paper only describes the maximal distance to the nucleus and not the entire size. nebula around the Teacup galaxy: 363,000 ly (111,000 pc) [20] ionized nebula part of the circumgalactic medium around the Teacup galaxy, illuminated by the AGN: Lyman-alpha blob 1: 300,000 ly (92,000 pc) [21] LαB
[2] [35] Every nebula begins with a certain amount of angular momentum. Gas in the central part of the nebula, with relatively low angular momentum, undergoes fast compression and forms a hot hydrostatic (not contracting) core containing a small fraction of the mass of the original nebula. [38] This core forms the seed of what will become a star.
The image of the Horsehead Nebula captures the iconic nebula in a whole new light. NASA releases 'unprecedented' Horsehead Nebula image captured by James Webb Space Telescope. What to know about ...
NGC 7635, also known as the Bubble Nebula, Sharpless 162, or Caldwell 11, is an H II region [1] emission nebula in the constellation Cassiopeia. It lies close to the open cluster Messier 52 . The "bubble" is created by the stellar wind from a massive hot, 8.7 [ 1 ] magnitude young central star , SAO 20575 ( BD+60°2522 ). [ 7 ]