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Psamathe (moon)
Psamathe , also known as Neptune X, is a retrograde motion, retrograde irregular satellite of Neptune. It is named after Psamathe (Nereid), Psamathe, one of the Nereids. Psamathe was discovered by Scott S. Sheppard and David C. Jewitt in 2003 using the 8.2 meter Subaru Telescope. Before it was officially named on February 3, 2007 (IAUC 8802), it was known by the provisional designation S/2003 N 1. Psamathe is about 38 kilometers in diameter. It orbits Neptune at a distance of between 25.7 and 67.7 million km (for comparison, the Sun–Mercury (planet), Mercury distance varies between 46 million and 69.8 million km) and requires almost 25 Earth years to make one orbit. The orbit of this satellite is close to the Hill sphere#True region of stability, theoretical stable separation from Neptune for a body in a retrograde orbit. Given the similarity of Psamathe's orbital parameters with Neso (moon), Neso (S/2002 N 4), it was suggested that both irregular satellites could have a comm ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Subaru Telescope
is the telescope of the National Astronomical Observatory of Japan, located at the Mauna Kea Observatory on Hawaii. It is named after the open star cluster known in English as the Pleiades. It had the largest monolithic primary mirror in the world from its commissioning until the Large Binocular Telescope opened in 2005. Overview The Subaru Telescope is a Ritchey-Chretien reflecting telescope. Instruments can be mounted at a Cassegrain focus below the primary mirror; at either of two Nasmyth focal points in enclosures on the sides of the telescope mount, to which light can be directed with a tertiary mirror; or at the prime focus in lieu of a secondary mirror, an arrangement rare on large telescopes, to provide a wide field of view suited to deep wide-field surveys. In 1984, the University of Tokyo formed an engineering working group to develop and study the concept of a telescope. In 1985, the astronomy committee of Japan's science council gave top priority to the de ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Provisional Designation
Provisional designation in astronomy is the naming convention applied to astronomical objects immediately following their discovery. The provisional designation is usually superseded by a permanent designation once a reliable orbit has been calculated. Approximately 47% of the more than 1,100,000 known minor planets remain provisionally designated, as hundreds of thousands have been discovered in the last two decades. The modern system is overseen by the Minor Planet Center of the International Astronomical Union. __TOC__ Minor planets The current system of provisional designation of minor planets (asteroids, centaurs and trans-Neptunian objects) has been in place since 1925. It superseded several previous conventions, each of which was in turn rendered obsolete by the increasing numbers of minor planet discoveries. A modern or new-style provisional designation consists of the year of discovery, followed by two letters and, possibly, a suffixed number. New-style provisiona ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Discoveries By Scott S
Discoveries may refer to: Media Film and television * ''Discoveries'' (film), a 1939 British film * ''Discoveries'' (TV series), a Canadian youth science television series * "Discoveries", a Series D episode of the television series ''QI'' (2006) * "Discoveries" (''Hotel Portofino''), a 2022 TV episode Literature * ''Discoveries'' (Robertson Davies), a 2002 book by Robertson Davies * ''Abrams Discoveries'', a series of illustrated non-fiction books published by Harry N. Abrams * ''Discoveries'', a work by William Butler Yeats, written in 1907 * ''Discoveries'', a magazine published by Cedars-Sinai Medical Center Music * ''Discoveries'' (Cannonball Adderley album), 1955 * ''Discoveries'' (Josh Nelson album), 2011 * ''Discoveries'' (Northlane album), 2011 Other uses * Discoveries (horse), a racehorse See also * Age of Discoveries * Discovery (other) * Explorations (other) Exploration is the process of discovery. Exploration or explorations may ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Irregular Satellites
In astronomy, an irregular moon, irregular satellite, or irregular natural satellite is a natural satellite following an orbit that is irregular in some of the following ways: Distant; orbital inclination, inclined; orbital eccentricity, highly elliptical; Retrograde and prograde motion, retrograde. They have often been Asteroid capture, captured by their parent planet, unlike regular satellites formed in orbit around them. Irregular moons have a stable orbit, unlike temporary satellites which often have similarly irregular orbits but will eventually depart. The term does not refer to shape; Triton (moon), Triton, for example, is a planetary-mass moon, round moon but is considered irregular due to its orbit and origins. , 356 irregular moons are known, orbiting all four of the outer planets (Jupiter, Saturn, Uranus, and Neptune). The largest of each planet are Himalia (moon), Himalia of Jupiter, Phoebe (moon), Phoebe of Saturn, Sycorax (moon), Sycorax of Uranus, and Triton (moon), ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neso Group
The National Energy System Operator (NESO) is the nationalised energy system operator for the United Kingdom. Previously owned by National Grid plc, when it was known as National Grid ESO, it is a publicly owned organisation which operates both the electricity transmission and gas distribution systems from 1 October 2024. The buyout from National Grid was announced in September 2024, and was valued at £630m. NESO is chaired by Paul Golby and its chief executive officer is Fintan Slye. NESO has been set up as the Independent System Operator and Planner (ISOP) under the provisions of part 5 of the Energy Act 2023, and was previously known informally as the Future System Operator (FSO) prior to the announcement of its official name. It holds the licences for operating the electricity system and for planning the gas system. NESO is expected to work closely with Great British Energy to accelerate the deployment of renewable energy in the United Kingdom Renewable energy in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jet Propulsion Laboratory
The Jet Propulsion Laboratory (JPL) is a Federally funded research and development centers, federally funded research and development center (FFRDC) in La Cañada Flintridge, California, Crescenta Valley, United States. Founded in 1936 by California Institute of Technology (Caltech) researchers, the laboratory is now owned and sponsored by NASA and administered and managed by Caltech. The primary function of the laboratory is the construction and operation of planetary robotic spacecraft, though it also conducts Earth-orbit and astronomy missions. It is also responsible for operating the NASA Deep Space Network (DSN). Among the major active projects at the laboratory, some are the Mars 2020 mission, which includes the ''Perseverance (rover), Perseverance'' rover; the Mars Science Laboratory mission, including the ''Curiosity (rover), Curiosity'' rover; the ''Mars Reconnaissance Orbiter''; the ''Juno (spacecraft), Juno'' spacecraft orbiting Jupiter; the ''Soil Moisture Active P ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Moons Of Neptune
The planet Neptune has 16 known natural satellite, moons, which are named for minor List of water deities, water deities and a Hippocampus (mythology), water creature in Greek mythology.This is a IAU guideline that will be followed at the naming of every Neptunian moon, although two (S/2002 N 5 and S/2021 N 1) have yet to receive permanent names. By far the largest of them is Triton (moon), Triton, discovered by William Lassell on 10 October 1846, 17 days after the discovery of Neptune itself. Over a century passed before the discovery of the second natural satellite, Nereid (moon), Nereid, in 1949, and another 40 years passed before Proteus (moon), Proteus, Neptune's second-largest moon, was discovered in 1989. Triton is unique among moons of Planetary-mass object, planetary mass in that its orbit is Retrograde and prograde motion, retrograde to Neptune's rotation and Orbital inclination, inclined relative to Neptune's equator, which suggests that it did not form in orbit around ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hill Sphere
The Hill sphere is a common model for the calculation of a Sphere of influence (astrodynamics), gravitational sphere of influence. It is the most commonly used model to calculate the spatial extent of gravitational influence of an astronomical body (''m'') in which it dominates over the gravitational influence of other bodies, particularly a Primary (astronomy), primary (''M''). It is sometimes confused with other models of gravitational influence, such as the Laplace sphere or being named the Roche sphere, the latter causing confusion with the Roche limit. It was defined by the United States, American astronomer George William Hill, based on the work of the France, French astronomer Édouard Roche. To be retained by a more gravitationally attracting astrophysical object—a planet by a more massive star, a natural satellite, moon by a more massive planet—the less massive body must have an orbit that lies within the gravitational potential represented by the more massive body ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mercury (planet)
Mercury is the first planet from the Sun. It is a rocky planet with a trace atmosphere. While it is the List of Solar System objects by size, smallest and least massive planet of the Solar System, its surface gravity is slightly higher than that of Mars. The surface of Mercury is similar to Earth's Moon, heavily Impact crater, cratered, with expansive rupes system, generated from thrust faults, and bright ray systems, formed by ejecta. Its largest crater, Caloris Planitia, has a diameter of , which is about one-third the diameter of the planet (). Being the most inferior planet, inferior orbiting planet it appears in Earth's sky, always close to the Sun, either as a "morning star" or an "evening star". It stays most of the time the closest to all other planets and is the planet with the highest delta-v needed to travel to from all other planets of the Solar System. Mercury's sidereal year (88.0 Earth days) and sidereal day (58.65 Earth days) are in a 3:2 ratio. This relation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Psamathe VLT-FORS2 2010-07-13 Annotated
Psamathe may refer to: Greek mythology * Psamathe (Nereid) * Psamathe (Crotopus), Daughter of Crotopus Other * Psamathe (moon), moon of Neptune * ''Psamathe'' (polychaete), polychaete Polychaeta () is a paraphyletic class of generally marine Annelid, annelid worms, common name, commonly called bristle worms or polychaetes (). Each body segment has a pair of fleshy protrusions called parapodia that bear many bristles, called c ... worm genus * ''Psamathe'' (Leighton), 1880 painting of the Nereid by Frederic Leighton {{disamb ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nereid
In Greek mythology, the Nereids or Nereides ( ; ; , also Νημερτές) are sea nymphs (female spirits of sea waters), the 50 daughters of the ' Old Man of the Sea' Nereus and the Oceanid Doris, sisters to their brother Nerites. They often accompany Poseidon, the god of the sea, and can be friendly and helpful to sailors (such as the Argonauts in their search for the Golden Fleece). Name It is not known whether the name Nereus was known to Homer or not, but the name of the Nereids is attested before it, and can be found in the ''Iliad''.; ; Since Nereus only has relevance as the father of the Nereids, it has been suggested that his name could actually be derived from that of his daughters; while the derivation of the Nereids from Nereus, as a patronymic, has also been suggested. According to Martin Litchfield West (1966), Nereus is much less important than his daughters, mentioning that Herodotus offered "the Nereids, not Nereus, as an example of a divine name not deri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Psamathe (Nereid)
In Greek mythology, Psamathe () is a Nereid, one of the fifty daughters of the sea god Nereus and the Oceanids, Oceanid Doris (Oceanid), Doris. By Aeacus, the king of Aegina, she is the mother of a son, Phocus of Aegina, Phocus. When Phocus is killed by his half-brothers Peleus and Telamon, Psamathe sends a giant wolf at Peleus's herd. Family Psamathe is one of the fifty Nereids, daughters of Nereus and Doris (Oceanid), Doris. By Aeacus, the king of Aegina, she is the mother of a son, Phocus of Aegina, Phocus. She is later the wife of Proteus of Egypt, Proteus, king of Egypt, by whom she has a son, Theoclymenos, and a daughter, Eidothea (Greek myth), Eido (later known as Theonoe). Mythology There are two myths which involve Psamathe. The first is the story of her violation by Aeacus. Upon his advances, she transforms herself into a seal in an attempt to escape. She is unsuccessful, however, and from their union is born Phocus, whose name (''phoke'' meaning "seal") recalls h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
