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Harpalyke (moon)
Harpalyke , also known as , is a retrograde irregular satellite of Jupiter. It was discovered by a team of astronomers from the University of Hawaii led by Scott S. Sheppard in 2000, and given the temporary designation .MPEC 2001-A28: ''S/2000 J 2, S/2000 J 3, S/2000 J 4, S/2000 J 5, S/2000 J 6'' January 5, 2001 (discovery and ephemeris) In August 2003, the moon was named 22 October 2002 (naming the moon) after Harpalyke, the incestuous daughter of Clymenus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
David Nesvorný
David (; , "beloved one") (traditional spelling), , ''Dāwūd''; grc-koi, Δαυΐδ, Dauíd; la, Davidus, David; gez , ዳዊት, ''Dawit''; xcl, Դաւիթ, ''Dawitʿ''; cu, Давíдъ, ''Davidŭ''; possibly meaning "beloved one". was, according to the Hebrew Bible, the third king of the United Kingdom of Israel. In the Books of Samuel, he is described as a young shepherd and harpist who gains fame by slaying Goliath, a champion of the Philistines, in southern Canaan. David becomes a favourite of Saul, the first king of Israel; he also forges a notably close friendship with Jonathan, a son of Saul. However, under the paranoia that David is seeking to usurp the throne, Saul attempts to kill David, forcing the latter to go into hiding and effectively operate as a fugitive for several years. After Saul and Jonathan are both killed in battle against the Philistines, a 30-year-old David is anointed king over all of Israel and Judah. Following his rise to power, David c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jet Propulsion Laboratory
The Jet Propulsion Laboratory (JPL) is a federally funded research and development center and NASA field center in the City of La Cañada Flintridge, California, United States. Founded in the 1930s by Caltech researchers, JPL is owned by NASA and managed by the nearby California Institute of Technology (Caltech). The laboratory's primary function 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. Among the laboratory's major active projects are the Mars 2020 mission, which includes the ''Perseverance'' rover and the '' Ingenuity'' Mars helicopter; the Mars Science Laboratory mission, including the ''Curiosity'' rover; the InSight lander (''Interior Exploration using Seismic Investigations, Geodesy and Heat Transport''); the ''Mars Reconnaissance Orbiter''; the ''Juno'' spacecraft orbiting Jupiter; the ''SMAP'' satellite for earth surface s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eccentricity (orbit)
In astrodynamics, the orbital eccentricity of an astronomical object is a dimensionless parameter that determines the amount by which its orbit around another body deviates from a perfect circle. A value of 0 is a circular orbit, values between 0 and 1 form an elliptic orbit, 1 is a parabolic escape orbit (or capture orbit), and greater than 1 is a hyperbola. The term derives its name from the parameters of conic sections, as every Kepler orbit is a conic section. It is normally used for the isolated two-body problem, but extensions exist for objects following a rosette orbit through the Galaxy. Definition In a two-body problem with inverse-square-law force, every orbit is a Kepler orbit. The eccentricity of this Kepler orbit is a non-negative number that defines its shape. The eccentricity may take the following values: * circular orbit: ''e'' = 0 * elliptic orbit: 0 < ''e'' < 1 * [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Inclination
Orbital inclination measures the tilt of an object's orbit around a celestial body. It is expressed as the angle between a Plane of reference, reference plane and the orbital plane or Axis of rotation, axis of direction of the orbiting object. For a satellite orbiting the Earth directly above the Equator, the plane of the satellite's orbit is the same as the Earth's equatorial plane, and the satellite's orbital inclination is 0°. The general case for a circular orbit is that it is tilted, spending half an orbit over the northern hemisphere and half over the southern. If the orbit swung between 20° north latitude and 20° south latitude, then its orbital inclination would be 20°. Orbits The inclination is one of the six orbital elements describing the shape and orientation of a celestial orbit. It is the angle between the orbital plane and the plane of reference, normally stated in degree (angle), degrees. For a satellite orbiting a planet, the plane of reference is usually ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kaare Aksnes
Kaare Aksnes (born 25 March 1938 in Kvam in Hardanger) is a professor at the Institute for Theoretical Astrophysics at the University of Oslo. Personal life He was born in Kvam, Hordaland as a brother of the chemist Gunnar Aksnes. His parents were farmers. In 1959 he married teacher Liv Kristin Marøy. Career He finished his secondary education in 1956, and graduated with the cand.real. degree in 1963, having studied in both Bergen and Oslo. From 1964 to 1965 he was a research assistant at Harestua. He then worked in the United States for several years, and took the Ph.D. at Yale University in 1969. His doctor's thesis is today a standard work within estimating the course of planets, moons, meteors, comets and artificial sounds. His work is among other things used by NASA's Voyager sounds to Jupiter, and he received the NASA Group Achievement Award for his work. After several years at the Center for Astrophysics Harvard & Smithsonian in Cambridge, Massachusetts he returned fr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brett J
Brett derives from a Middle English surname meaning "Briton" or "Breton", referring to the Celtic people of Britain and Brittany, France. Brette can be a feminine name. People with the surname * Adrian Brett (born 1945) English flutist and writer * Agnes Baldwin Brett (1876–1955), American numismatist * Bill Brett, Baron Brett (born 1942), English politician and businessman * Bob Brett (1953−2021), Australian tennis coach * Brian Brett (speedway rider) (1938-2006), English speedway rider * Brian Brett (born 1950), Canadian writer * Charles Brett (1928–2005), Northern Irish lawyer * Charles Brett (MP) (1715–1799), British politician * Dorothy Brett (1883–1977), British-American painter * George Brett (baseball) (born 1953), American baseball player, brother of Ken Brett * George Brett (general) (1886–1963), American general * George Wendell Brett (1912–2005), American philatelist * Henry Brett (polo player) (born 1974), English polo player * Jan Brett (born 1949), ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Matthew J
{{disambiguation ...
Matthew may refer to: * Matthew (given name) * Matthew (surname) * ''Matthew'' (ship), the replica of the ship sailed by John Cabot in 1497 * ''Matthew'' (album), a 2000 album by rapper Kool Keith * Matthew (elm cultivar), a cultivar of the Chinese Elm ''Ulmus parvifolia'' Christianity * Matthew the Apostle, one of the apostles of Jesus * Gospel of Matthew, a book of the Bible See also * Matt (given name), the diminutive form of Matthew * Mathew, alternative spelling of Matthew * Matthews (other) * Matthew effect * Tropical Storm Matthew (other) The name Matthew was used for three tropical cyclones in the Atlantic Ocean, replacing Mitch after 1998. * Tropical Storm Matthew (2004) - Brought heavy rain to the Gulf Coast of Louisiana, causing light damage but no deaths. * Tropical Storm Matt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tommy Grav
This is a list of minor-planet discoverers credited by the Minor Planet Center with the discovery of one or several minor planets (such as near-Earth and main-belt asteroids, Jupiter trojans and distant objects). , the discovery of 612,011 numbered minor planets are credited to 1141 astronomers and 253 observatories, telescopes or surveys ''(see )''. On how a discovery is made, ''see observations of small Solar System bodies. For a description of the tables below, see ''. Discovering astronomers }, (bio-de) , align=left , M. Matsuyama , , - id="D. Matter" , align=left , Daniel Matter , 7 , 1957–pres. , , align=left , D. Matter; amateur, (bio-it) , align=left , D. Matter , , - id="A. Maury" , align=left , Alain Maury , 9 , 1958–pres. , , align=left , A. Maury; , align=left , A. Maury , , - id="D. Mayes" , align=left , Deronda Mayes , , 1957–pres. , , align=left , D. Mayes; inferred , align=left , D. Mayes , , - id="E. Mazzoni ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
C-type Asteroid
C-type (carbonaceous) asteroids are the most common variety, forming around 75% of known asteroids. They are volatile-rich and distinguished by a very low albedo because their composition includes a large amount of carbon, in addition to rocks and minerals. Their density averages at about . They occur most frequently at the outer edge of the asteroid belt, 3.5 astronomical units (AU) from the Sun, where 80% of the asteroids are of this type, whereas only 40% of asteroids at 2 AU from the Sun are C-type. The proportion of C-types may actually be greater than this, because C-types are much darker (and therefore less detectable) than most other asteroid types except for D-types and others that are mostly at the extreme outer edge of the asteroid belt. Characteristics Asteroids of this class have spectra very similar to those of carbonaceous chondrite meteorites (types CI and CM). The latter are very close in chemical composition to the Sun and the primitive solar nebula minus h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Color Index
In astronomy, the color index is a simple numerical expression that determines the color of an object, which in the case of a star gives its temperature. The lower the color index, the more blue (or hotter) the object is. Conversely, the larger the color index, the more red (or cooler) the object is. This is a consequence of the logarithmic magnitude scale, in which brighter objects have smaller (more negative) magnitudes than dimmer ones. For comparison, the whitish Sun has a B−V index of , whereas the bluish Rigel has a B−V of −0.03 (its B magnitude is 0.09 and its V magnitude is 0.12, B−V = −0.03). Traditionally, the color index uses Vega as a zero point. To measure the index, one observes the magnitude of an object successively through two different filters, such as U and B, or B and V, where U is sensitive to ultraviolet rays, B is sensitive to blue light, and V is sensitive to visible (green-yellow) light (see also: UBV system). The set of passbands or filter ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carolyn C
Carolyn is a female given name, a variant of Caroline. Other spellings include Karolyn, Carolyne, Carolynn or Carolynne. Caroline itself is one of the feminine forms of Charles. List of Notable People *Carolyn Bennett (born 1950), Canadian politician *Carolyn Bertozzi (born 1966), American chemist and Nobel laureate *Carolyn Bessette-Kennedy (1966–1999), wife of John F. Kennedy, Jr. *Carolyn Brown (choreographer) (born 1927), American dancer, choreographer, and writer *Carolyn Brown (newsreader), English newsreader *Carolyn Cassady (1923–2013), American writer and wife of Neal Cassady *C. J. Cherryh (Carolyn Janice Cherryh; born 1942), American science fiction and fantasy writer *Carolyn Chiechi (born 1943), judge of the United States Tax Court *Carolyn Cooper (born 1959), Jamaican author and literary scholar * Carolyn Davidson, several people * Carolyn Eaton, murder victim * Carolyn Fe, Filipina singer and actress *Carolyn Forché (born 1950), American poet, editor, transla ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
