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Parrot (crater)
Oblique view of Parrot D crater, with most of Parrot itself in upper right, from Apollo 14 Parrot is the remains of a lunar impact crater that has been almost completely worn away. It was named after Russian doctor and physicist Friedrich Parrot. It is attached to the southern rim of the crater Albategnius, and is located among the rugged highlands among the south-central part of the visible 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 .... To the east is the small crater Vogel, and in the southeast is Arzachel. Little remains of the southwestern rim of Parrot, and the other sections of the wall have been worn and smoothed by impact erosion. The remains of a pair of overlapping craters occupy much of the northern floor of the crater, and the remainder is irregular but rel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lunar Orbiter 4
Lunar Orbiter 4 was a robotic U.S. spacecraft, part of the Lunar Orbiter program, Lunar Orbiter Program, designed to orbit the Moon, after the three previous orbiters had completed the required needs for Project Apollo, Apollo mapping and site selection. It was given a more general objective, to "perform a broad systematic photographic survey of lunar surface features in order to increase the scientific knowledge of their nature, origin, and processes, and to serve as a basis for selecting sites for more detailed scientific study by subsequent orbital and landing missions". It was also equipped to collect selenodetic, radiation intensity, and micrometeoroid impact data. Mission Summary The spacecraft was placed in a Free-return trajectory, cislunar trajectory and injected into an elliptical near polar high lunar orbit for data acquisition. The orbit was with an inclination of 85.5 degrees and a period of 12 hours. After initial photography on May 11, 1967 problems started occu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Friedrich Parrot
Johann Jacob Friedrich Wilhelm Parrot (14 October 1791) was a Baltic German naturalist, explorer, and mountaineer, who lived and worked in Dorpat (today Tartu, Estonia) in what was then the Governorate of Livonia of the Russian Empire. A pioneer of Russian and Estonian scientific mountaineering, Parrot is best known for leading the first expedition to the summit of Mount Ararat in recorded history. Early career Born in Karlsruhe, in the Margraviate of Baden, Parrot was the son of Georg Friedrich Parrot, the first rector of the University of Dorpat (today the University of Tartu) and a close friend of Tsar Alexander I. He studied medicine and natural science at Dorpat and, in 1811, undertook an expedition to the Crimea and the Caucasus with Moritz von Engelhardt. There he used a barometer to measure the difference in sea level between the Caspian Sea and Black Sea. On his return he was appointed assistant doctor and, in 1815, surgeon in the Imperial Russian Army. In 1816 and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parrot D Crater AS14-73-10082
Parrots, also known as psittacines (), are birds of the roughly 398 species in 92 genera comprising the order Psittaciformes (), found mostly in tropical and subtropical regions. The order is subdivided into three superfamilies: the Psittacoidea ("true" parrots), the Cacatuoidea (cockatoos), and the Strigopoidea (New Zealand parrots). One-third of all parrot species are threatened by extinction, with higher aggregate extinction risk ( IUCN Red List Index) than any other comparable bird group. Parrots have a generally pantropical distribution with several species inhabiting temperate regions in the Southern Hemisphere, as well. The greatest diversity of parrots is in South America and Australasia. Characteristic features of parrots include a strong, curved bill, an upright stance, strong legs, and clawed zygodactyl feet. Many parrots are vividly coloured, and some are multi-coloured. Most parrots exhibit little or no sexual dimorphism in the visual spectrum. They form the most ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
