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Promontorium Heraclides
Promontorium Heraclides is a raised mountainous cape situated in Mare Imbrium on the near side of the Moon. Its selenographic coordinates are 40.3° N, 33.2° W and it is 50 km in diameter. It marks the western edge of the bay of Sinus Iridum. Promontorium Heraclides is named after Heraclides Ponticus, a Greek philosopher and astronomer. The Soviet lunar probe Luna 17 landed about 30 km from Promontorium Heraclides on November 17, 1970. The land form is depicted as the face of a woman looking across Sinus Iridum in a 1679 lunar map by Giovanni Domenico Cassini Giovanni Domenico Cassini, also known as Jean-Dominique Cassini (8 June 1625 – 14 September 1712) was an Italian (naturalised French) mathematician, astronomer and engineer. Cassini was born in Perinaldo, near Imperia, at that time in the C ...; this depiction, of disputed origin, is known as the "Moon Maiden". References External links * , excellent earth-based image of Sinus Iridum and vicinity, incl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wac Sinus Iridum300m
WAC may refer to: Arts * Walker Art Center, a modern art museum in Minneapolis, Minnesota * Walton Arts Center, a performing arts center in Fayetteville, Arkansas * Warwick Arts Centre, at the University of Warwick in Coventry, England Science * WAC (gene) * Welsh Agricultural College * World Archaeological Congress * World Association of Copepodologists * World Agroforestry Centre Sports * FAI World Aerobatic Championships * Washington Athletic Club located in Seattle, Washington * Western Athletic Conference, an NCAA Division I affiliated college athletics conference * Wiener AC, an Austrian sports club * Wolfsberger AC, an Austrian football club * Wydad AC, a Moroccan sports club Transport * Wan Chai station, Hong Kong, by MTR station code * Warrington Central railway station, England, by National Rail station code2 Other * WAC Corporal, the first U.S. sounding rocket * Washington-Alexandria Architecture Center, extension of Virginia Tech * Waste Acceptance Criteria, Eur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Promontorium Heraclides AS15-93-12714
A promontory is a prominent mass of land which overlooks lower lying land or a body of water. Promontory may also refer to: Geology and geography *Promontory Summit, where the United States first transcontinental railroad was completed in Box Elder County, Utah **Promontory, Utah, an unincorporated community on Promontory Summit *Promontory Mountains, a mountain range in Box Elder County, Utah, United States Anatomy *Sacral promontory, in anatomy, the anteriormost portion of the sacrum * Promontory of tympanic cavity, a part of the ear Other *"Promontory", a 1992 song from ''The Last of the Mohicans'' soundtrack *Promontory Financial Group Promontory Financial Group, a wholly owned subsidiary of IBM, is a global consulting firm that advises clients on a variety of financial services matters, including regulatory issues, compliance, risk management, liquidity, restructuring, acqui ..., a wholly owned subsidiary of IBM See also * Promontory Point (other) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mare Imbrium
Mare Imbrium (Latin ''imbrium'', the "Sea of Showers" or "Sea of Rains", "Sea of Tears") is a vast lava plain within the Imbrium Basin on the Moon and is one of the larger craters in the Solar System. The Imbrium Basin formed from the collision of a proto-planet during the Late Heavy Bombardment. Basaltic lava later flooded the giant crater to form the flat volcanic plain seen today. The basin's age has been estimated using uranium–lead dating methods to approximately 3.9 billion years ago, and the diameter of the impactor has been estimated to be 250 ± 25 km. The Moon's maria (plural of mare) have fewer features than other areas of the Moon because molten lava pooled in the craters and formed a relatively smooth surface. Mare Imbrium is not as flat as it was originally thought, because later events have altered its surface. Origin Mare Imbrium formed when a proto-planet from the asteroid belt collided with the moon during the Late Heavy Bombardment. The impact i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Moon
The Moon is Earth's only natural satellite. It is the fifth largest satellite in the Solar System and the largest and most massive relative to its parent planet, with a diameter about one-quarter that of Earth (comparable to the width of Australia). The Moon is a planetary-mass object with a differentiated rocky body, making it a satellite planet under the geophysical definitions of the term and larger than all known dwarf planets of the Solar System. It lacks any significant atmosphere, hydrosphere, or magnetic field. Its surface gravity is about one-sixth of Earth's at , with Jupiter's moon Io being the only satellite in the Solar System known to have a higher surface gravity and density. The Moon orbits Earth at an average distance of , or about 30 times Earth's diameter. Its gravitational influence is the main driver of Earth's tides and very slowly lengthens Earth's day. The Moon's orbit around Earth has a sidereal period of 27.3 days. During each synodic period ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Selenographic Coordinates
The selenographic coordinate system is used to refer to locations on the surface of Earth's moon. Any position on the lunar surface can be referenced by specifying two numerical values, which are comparable to the latitude and longitude of Earth. The longitude gives the position east or west of the Moon's prime meridian, which is the line passing from the lunar north pole through the point on the lunar surface directly facing Earth to the lunar south pole. (See also Earth's prime meridian.) This can be thought of as the midpoint of the visible Moon as seen from the Earth. The latitude gives the position north or south of the lunar equator. Both of these coordinates are given in degrees. Astronomers defined the fundamental location in the selenographic coordinate system by the small, bowl-shaped satellite crater ' Mösting A'. The coordinates of this crater are defined as: : Later, the coordinate system has become more precisely defined due to the Lunar Laser Ranging E ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sinus Iridum
Sinus Iridum (Latin ''sinus īridum'' "Bay of Rainbows") is a plain of basaltic lava that forms a northwestern extension to the Mare Imbrium on Earth's moon. It is surrounded from the northeast to the southwest by the Montes Jura range. The protruding part of the range at the southwest end is named Promontorium Heraclides, while that at the northeast end is called Promontorium Laplace. This bay and the surrounding mountains is considered one of the most beautiful features on the Moon, and is a favorite among lunar observers. Sinus Iridum is formed from the remains of a large impact crater, which was subsequently flooded with basaltic lava, inundating the "sea" wall. The bay itself does not contain any notable impact craters, but does include the satellite crater Heraclides E in the south, Laplace A along the eastern edge, and Bianchini G in the north. The surface is level, but is marked by a number of wrinkle ridges (dorsa). The selenographic coordinates of the bay's center are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heraclides Ponticus
Heraclides Ponticus ( grc-gre, Ἡρακλείδης ὁ Ποντικός ''Herakleides''; c. 390 BC – c. 310 BC) was a Greek philosopher and astronomer who was born in Heraclea Pontica, now Karadeniz Ereğli, Turkey, and migrated to Athens. He is best remembered for proposing that the Earth rotates on its axis, from west to east, once every 24 hours. He is also hailed as the originator of the heliocentric theory, although this is doubted by some. Life Heraclides' father was Euthyphron, a wealthy nobleman who sent his son to study at the Platonic Academy in Athens under its founder Plato and under his successor Speusippus. According to the ''Suda'', Plato, on his departure for Sicily in 361/360 BC, left the Academy in the charge of Heraclides. Heraclides was nearly elected successor to Speusippus as head of the academy in 339/338 BC, but narrowly lost to Xenocrates. Work All of Heraclides' writings have been lost; only a few fragments remain. Like the Pythagoreans Hicetas and E ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Luna 17
''LOK Luna 17'' (Ye-8 series) was an unmanned space mission of the Luna program, also called ''Lunik 17''. It deployed the first robotic rover onto the surface of the Moon. Launch ''Luna 17'' was launched from an Earth parking orbit towards the Moon and entered lunar orbit on 15 November 1970. The spacecraft softly landed on the Moon in the Mare Imbrium (Sea of Rains). The spacecraft had dual ramps by which the payload, ''Lunokhod 1'', descended to the lunar surface. ''Lunokhod 1'' was a lunar vehicle formed of a tub-like compartment with a large convex lid on eight independently powered wheels. ''Lunokhod 1'' was equipped with a cone-shaped antenna, a highly directional helical antenna, four teleray spectrometer, an x-ray telescope, cosmic-ray detectors, and a laser device were also included. The vehicle was powered by a solar cell array mounted on the underside of the lid. ''Lunokhod 1'' was intended to operate through three lunar days but actually operated for eleven lunar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Giovanni Domenico Cassini
Giovanni Domenico Cassini, also known as Jean-Dominique Cassini (8 June 1625 – 14 September 1712) was an Italian (naturalised French) mathematician, astronomer and engineer. Cassini was born in Perinaldo, near Imperia, at that time in the County of Nice, part of the Savoyard state. Cassini is known for his work on astronomy and engineering. He discovered four satellites of the planet Saturn and noted the division of the rings of Saturn; the Cassini Division was named after him. Giovanni Domenico Cassini was also the first of his family to begin work on the project of creating a topographic map of France. The ''Cassini'' space probe, launched in 1997, was named after him and became the fourth to visit the planet Saturn and the first to orbit the planet. Life Time in Italy Cassini was the son of Jacopo Cassini, a Tuscan, and Giulia Crovesi. In 1648 Cassini accepted a position at the observatory at Panzano, near Bologna, to work with Marquis Cornelio Malvasia, a rich amate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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