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Neptune Trojan
Neptune trojans are bodies that orbit the Sun near one of the stable Lagrangian points of Neptune, similar to the Trojan (astronomy), trojans of other planets. They therefore have approximately the same orbital period as Neptune and follow roughly the same orbital path. Twenty-eight Neptune trojans are currently known, of which 24 orbit near the Sun–Neptune Lagrangian point 60° ahead of Neptune and four orbit near Neptune's region 60° behind Neptune. The Neptune trojans are termed 'trojans' by analogy with the Jupiter trojans. The discovery of in a high-inclination (>25°) orbit was significant, because it suggested a "thick" cloud of trojans (Jupiter trojans have inclinations up to 40°), which is indicative of freeze-in capture instead of in situ or collisional formation. It is suspected that large (radius ≈ 100 km) Neptune trojans could outnumber Jupiter trojans by an order of magnitude. E. I. Chiang and Y. Lithwick ''Neptune Trojans as a Testbed for Planet Forma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Horseshoe Orbit
In celestial mechanics, a horseshoe orbit is a type of co-orbital configuration, co-orbital motion of a small orbiting body relative to a larger orbiting body. The osculating orbit, osculating (instantaneous) orbital period of the smaller body remains very near that of the larger body, and if its orbit is a little more eccentric than that of the larger body, during every period it appears to trace an ellipse around a point on the larger object's orbit. However, the loop is not closed but drifts forward or backward so that the point it circles will appear to move smoothly along the larger body's orbit over a long period of time. When the object approaches the larger body closely at either end of its trajectory, its apparent direction changes. Over an entire cycle the center traces the outline of a horseshoe, with the larger body between the 'horns'. Asteroids in horseshoe orbits with respect to Earth include 54509 YORP, , , and possibly . A broader definition includes 3753 Cruith ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Clete (Amazon)
In Greek mythology, the Amazons (Ancient Greek: Ἀμαζόνες ''Amazónes'', singular Ἀμαζών ''Amazōn'', via Latin ''Amāzon, -ŏnis'') are portrayed in a number of ancient epic poems and legends, such as the Labours of Hercules, the ''Argonautica'' and the ''Iliad''. They were a group of female warriors and hunters, who beat men in physical agility and strength, in archery, riding skills, and the arts of combat. Their society was closed for men and they only raised their daughters, either killing their sons or returning them to their fathers, with whom they would only socialize briefly in order to reproduce. Courageous and fiercely independent, the Amazons, commanded by their queen, regularly undertook extensive military expeditions into the far corners of the world, from Scythia to Thrace, Asia Minor and the Aegean Islands, reaching as far as Arabia and Egypt. Besides military raids, the Amazons are also associated with the foundation of temples and the estab ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
385695 Clete
385695 Clete, provisional designation , is a Neptune trojan, co-orbital with the ice giant Neptune, approximately in diameter. It was named after Clete, one of the Amazons from Greek mythology. The minor planet was discovered on 8 October 2005, by American astronomers Scott Sheppard and Chad Trujillo at Las Campanas Observatory in Chile. 23 known Neptune trojans have already been discovered. Numbering and naming This minor planet was named from Greek mythology after Clete, a member of the Amazons, an all-female warrior tribe that fought in the Trojan War on the side of the Trojans against the Greek. Clete was one of the twelve followers of the Amazonian queen Penthesilea and went looking for her after she went missing during the war. According to the queen's will, Clete sailed to Italy and founded the city of Clete. The official was published by the Minor Planet Center on 18 May 2019 (). The naming follows the scheme already established with 385571 Otrera, which is to n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Greek Mythology
A major branch of classical mythology, Greek mythology is the body of myths originally told by the Ancient Greece, ancient Greeks, and a genre of Ancient Greek folklore. These stories concern the Cosmogony, origin and Cosmology#Metaphysical cosmology, nature of the world, the lives and activities of List of Greek mythological figures, deities, Greek hero cult, heroes, and List of Greek mythological creatures, mythological creatures, and the origins and significance of the ancient Greeks' own cult (religious practice), cult and ritual practices. Modern scholars study the myths to shed light on the religious and political institutions of ancient Greece, and to better understand the nature of myth-making itself. The Greek myths were initially propagated in an oral tradition, oral-poetic tradition most likely by Minoan civilization, Minoan and Mycenaean Greece, Mycenaean singers starting in the 18th century BC; eventually the myths of the heroes of the Trojan War and its after ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Otrera
In Greek mythology, Otrera ( grc, Ὀτρήρη ''Otrērē'') was the founder and first Queen of the Amazons; the consort of Ares and mother of Hippolyta and Penthesilea. She is credited with being the founder of the shrine of Artemis in Ephesus. Mythology Queen of the Amazons Apollonius of Rhodes writes that the three cities of the Amazons are located in the plain of Doias. He further mentions a temple of Ares, Otrera and Antiope built in a desert island full of ravening birds. Otrera is sometimes considered the mythological founder of the Temple of Artemis in Ephesus, which was closely connected with Amazons. She is the queen and the founding mother of the Amazon nation. Otrera was the consort of Ares and mother by him of Hippolyta and Penthesilea; both went on to become queens of the Amazons. While usually said to be Ares' consort, in one version she's his daughter instead by an unknown mother. Otrera and the Temple of Artemis The war-like Amazons were credited with f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
385571 Otrera
385571 Otrera, provisional designation , is a Neptune trojan leading Neptune's orbit in the outer Solar System. It was discovered by American astronomers Scott Sheppard and Chad Trujillo at Las Campanas Observatory on 16 October 2004. It measures approximately 100 kilometers in diameter and was the second such body to be discovered after . Orbit and classification Neptune trojans are resonant trans-Neptunian objects in a 1:1 mean-motion orbital resonance with Neptune. These Trojans have a semi-major axis and an orbital period very similar to Neptune's (30.10 AU; 164.8 years). ''Otrera'' belongs to the group, which leads 60 ° ahead Neptune's orbit. It orbits the Sun with a semi-major axis of 30.027 AU at a distance of 29.3–30.7 AU once every 164 years and 6 months (60,099 days). Its orbit has an eccentricity of 0.02 and an inclination of 1 ° with respect to the ecliptic. Physical characteristics The discoverers estimate that the body has a mean-diameter of 100 k ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trojan War
In Greek mythology, the Trojan War was waged against the city of Troy by the Achaeans (Greeks) after Paris of Troy took Helen from her husband Menelaus, king of Sparta. The war is one of the most important events in Greek mythology and has been narrated through many works of Greek literature, most notably Homer's ''Iliad''. The core of the ''Iliad'' (Books II – XXIII) describes a period of four days and two nights in the tenth year of the decade-long siege of Troy; the ''Odyssey'' describes the journey home of Odysseus, one of the war's heroes. Other parts of the war are described in a cycle of epic poems, which have survived through fragments. Episodes from the war provided material for Greek tragedy and other works of Greek literature, and for Roman poets including Virgil and Ovid. The ancient Greeks believed that Troy was located near the Dardanelles and that the Trojan War was a historical event of the 13th or 12th century BC, but by the mid-19th century AD, both the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amazons
In Greek mythology, the Amazons (Ancient Greek: Ἀμαζόνες ''Amazónes'', singular Ἀμαζών ''Amazōn'', via Latin ''Amāzon, -ŏnis'') are portrayed in a number of ancient epic poems and legends, such as the Labours of Hercules, the ''Argonautica'' and the ''Iliad''. They were a group of female warriors and hunters, who beat men in physical agility and strength, in archery, riding skills, and the arts of combat. Their society was closed for men and they only raised their daughters, either killing their sons or returning them to their fathers, with whom they would only socialize briefly in order to reproduce. Courageous and fiercely independent, the Amazons, commanded by their queen, regularly undertook extensive military expeditions into the far corners of the world, from Scythia to Thrace, Asia Minor and the Aegean Islands, reaching as far as Arabia and Egypt. Besides military raids, the Amazons are also associated with the foundation of temples and the estab ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
International Astronomical Union
The International Astronomical Union (IAU; french: link=yes, Union astronomique internationale, UAI) is a nongovernmental organisation with the objective of advancing astronomy in all aspects, including promoting astronomical research, outreach, education, and development through global cooperation. It was founded in 1919 and is based in Paris, France. The IAU is composed of individual members, who include both professional astronomers and junior scientists, and national members, such as professional associations, national societies, or academic institutions. Individual members are organised into divisions, committees, and working groups centered on particular subdisciplines, subjects, or initiatives. As of 2018, the Union had over 13,700 individual members, spanning 90 countries, and 82 national members. Among the key activities of the IAU is serving as a forum for scientific conferences. It sponsors nine annual symposia and holds a triannual General Assembly that sets policy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Small Solar System Body
A small Solar System body (SSSB) is an object in the Solar System that is neither a planet, a dwarf planet, nor a natural satellite. The term was first defined in 2006 by the International Astronomical Union (IAU) as follows: "All other objects, except satellites, orbiting the Sun shall be referred to collectively as 'Small Solar System Bodies' ". (IAU) This encompasses all s and all s other than those that are |
Comet
A comet is an icy, small Solar System body that, when passing close to the Sun, warms and begins to release gases, a process that is called outgassing. This produces a visible atmosphere or coma, and sometimes also a tail. These phenomena are due to the effects of solar radiation and the solar wind acting upon the nucleus of the comet. Comet nuclei range from a few hundred meters to tens of kilometers across and are composed of loose collections of ice, dust, and small rocky particles. The coma may be up to 15 times Earth's diameter, while the tail may stretch beyond one astronomical unit. If sufficiently bright, a comet may be seen from Earth without the aid of a telescope and may subtend an arc of 30° (60 Moons) across the sky. Comets have been observed and recorded since ancient times by many cultures and religions. Comets usually have highly eccentric elliptical orbits, and they have a wide range of orbital periods, ranging from several years to potentially several mill ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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