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List Of Largest Nebulae
Below is a list of the largest known nebulae so far discovered, ordered by actual diameter. This list is prone to change because of inconsistencies between studies, the great distances of nebulae from our stellar neighborhood, and the constant refinement of technology and engineering. Caveats Nebulae have no standardized boundaries, so the measurements are subject to revision. Furthermore, scientists are still defining the features and parameters of nebulae. Because of these rapid developments and adjustments, this list may be unreliable. Lyman alpha nebulae around quasars can have sizes between 15 kpc and 460 kpc. Especially large Enormous Lyα nebula (ELAN) can have large sizes of ≳100 kpc. Farina et al. 2019 table 5 has an extensive compilation of Lyman alpha nebulae around quasars. For now this list contains only the largest ELANs, with sizes larger than 300 kpc. List See also * List of largest cosmic structures *List of largest known stars * List of largest plane ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nursery Of New Stars - GPN-2000-000972
Nursery may refer to: Childcare * Nursery (room), a room within the house designed for the care of a young child or children. * Nursery school, a daycare facility for preschool-age children * Prison nursery, for imprisoned mothers with their young children Places * Nursery, Texas, unincorporated community in Victoria County, Texas, United States * Nursery, Karachi, a suburb of Karachi, Sindh, Pakistan * Nursery Site, RI-273, historic site in Westerly, Rhode Island, United States * Nursery, British Columbia, a populated community in British Columbia Music * ''Nursery Suite'' (1931), by Edward Elgar * The Nursery (song cycle), ''The Nursery'' (song cycle) (1870), by Modest Mussorgsky Art * ''The Nursery (Gerard Dou), The Nursery'' (1660s), painting by Gerard Dou, lost with the sinking of the Vrouw Maria in 1771 * ''The Nursery (Christmas Stockings)'' (1936), painting by Stanley Spencer (76.5x91.8cm) Plants and gardens * Plant nursery, a place where young plants or trees are ra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
MAMMOTH-1
MAMMOTH-1 is a large ultraluminous lyman Alpha emitting radio-quiet nebula A nebula (; or nebulas) is a distinct luminescent part of interstellar medium, which can consist of ionized, neutral, or molecular hydrogen and also cosmic dust. Nebulae are often star-forming regions, such as in the Pillars of Creation in ... located near the center of a massive galaxy overdensity named BOSS1441 at a redshift distance of z= 2.32. The nebula has a size of 450 kiloparsecs making it one of the largest lyman-alpha nebula known comparable or even larger than the Slug nebula. As of to date, this nebula has the highest lyman alpha luminosity of any nebula with a luminosity of 5.2x10^44 ergs. Reference Nebulae {{nebula-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jackpot Nebula
The Jackpot Nebula is a large luminous Lyman-Alpha nebula located at a distance of z=2.041 with a size of 350 kpc. It has four quasars A quasar ( ) is an extremely Luminosity, luminous active galactic nucleus (AGN). It is sometimes known as a quasi-stellar object, abbreviated QSO. The emission from an AGN is powered by accretion onto a supermassive black hole with a mass rangi ... embedded within it and a overdensity of Lyman-Alpha emitting galaxies. The four quasars embedded within the Jackpot Nebula irradiate the nebula causing it to emitting light. References {{nebula-stub Nebulae ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Q0042−2627
Q, or q, is the seventeenth letter of the Latin alphabet, used in the modern English alphabet, the alphabets of other western European languages and others worldwide. Its name in English is pronounced , most commonly spelled ''cue'', but also ''kew'', ''kue'', and ''que''. History The Semitic sound value of Qôp was (voiceless uvular stop), and the form of the letter could have been based on the eye of a needle, a knot, or even a monkey with its tail hanging down. is a sound common to Semitic languages, but not found in many European languages. In common with other glyphs derived from the Proto-Sinaitic script, the letter has been suggested to have its roots in Egyptian hieroglyphs. In an early form of Ancient Greek, qoppa (Ϙ) probably came to represent several labialized velar stops, among them and . As a result of later sound shifts, these sounds in Greek changed to and respectively. Therefore, qoppa was transformed into two letters: qoppa, which stood for th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ivory Nebula
Ivory is a hard, white material from the tusks (traditionally from elephants) and teeth of animals, that consists mainly of dentine, one of the physical structures of teeth and tusks. The chemical structure of the teeth and tusks of mammals is the same, regardless of the species of origin, but ivory contains structures of mineralised collagen. The trade in certain teeth and tusks other than elephant is well established and widespread; therefore, "ivory" can correctly be used to describe any mammalian teeth or tusks of commercial interest which are large enough to be carved or scrimshawed. Besides natural ivory, ivory can also be produced synthetically, hence (unlike natural ivory) not requiring the retrieval of the material from animals. Tagua nuts can also be carved like ivory. The trade of finished goods of ivory products has its origins in the Indus Valley. Ivory is a main product that is seen in abundance and was used for trading in Harappan civilization. Finished ivory pro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Largest Galaxies
This is a list of largest galaxies known, sorted by order of increasing major axis diameters. The unit of measurement used is the light-year (approximately 9.46 kilometers). Overview Galaxies are vast collections of stars, planets, nebulae and other objects that are surrounded by an interstellar medium and held together by gravity. They do not have a definite boundary by nature, and are characterized with gradually decreasing stellar density as a function of increasing distance from its center. Because of this, measuring the sizes of galaxies can often be difficult and have a wide range of results depending on the sensitivity of the detection equipment and the methodology being used. Some galaxies emit more strongly in wavelengths outside the visible spectrum, depending on its stellar population, whose stars may emit more strongly in other wavelengths that are beyond the detection range. It is also important to consider the morphology of the galaxy when attempting to measure i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
H I Region
An HI region or H I region (read ''H one'') is a cloud in the interstellar medium composed of neutral atomic hydrogen (HI), in addition to the local abundance of helium and other elements. (H is the chemical symbol for hydrogen, and "I" is the Roman numeral. It is customary in astronomy to use the Roman numeral I for neutral atoms, II for singly-ionized—HII is H+ in other sciences—III for doubly-ionized, e.g. OIII is O++, etc.) These regions do not emit detectable visible light (except in spectral lines from elements other than hydrogen) but are observed by the 21-cm (1,420 MHz) region spectral line. This line has a very low transition probability, so it requires large amounts of hydrogen gas for it to be seen. At ionization fronts, where HI regions collide with expanding ionized gas (such as an H II region), the latter glows brighter than it otherwise would. The degree of ionization in an HI region is very small at around 10−4 (i.e. one particle in 10,000). At typical i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
NGC 262
NGC 262 (also known as Markarian 348) is the largest known spiral galaxy, located in the constellation Andromeda. It is a Seyfert 2 spiral galaxy located 287 million light years away. It was discovered on 17 September 1885 by Lewis A. Swift. According to A.M. Garcia, NGC 262 is a member of the NGC 315 Group (also known as LGG 14). This group contains 42 galaxies, including NGC 226, NGC 243, NGC 266, NGC 311, NGC 315, NGC 338, IC 43, IC 66, and IC 69, among others. Size This galaxy has an estimated diameter of 1.3 Million Light-years. It holds approximately 15 trillion stars. NGC 262 was tidally disturbed by the gravitational forces of smaller galaxies, which resulted in its large size. NGC 262 is very unusual, since it is 10 times larger than a regular spiral galaxy of its type. According to Morris and Wannier, NGC 262 is surrounded by a huge cloud of neutral hydrogen that is probably caused by the tidal stripping of smaller galaxies. The cloud has an apparent mass o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SDSS NGC 262 Sdss , a school in Delta, British Columbia, Canada
{{disambiguation ...
SDSS may refer to: * Sloan Digital Sky Survey, a major multi-filter imaging and spectroscopic redshift survey * Social Democratic Party of Slovakia * Spatial Decision Support System, a GIS based decision aiding system * Independent Democratic Serb Party, a political party of Croatian Serbs (''Samostalna demokratska srpska stranka'' in Serbo-Croatian) * South Delta Secondary School South Delta Secondary (SDSS) is a public high school in Tsawwassen, British Columbia, Canada. There are approximately 1,500 students enrolled in each grade 8 through 12 (as of 2019/2020). Graduation rates in the years 2005 to 2010 vary between 9 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
