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The timeline of discovery of Solar System planets and their natural satellites charts the progress of the discovery of new bodies over history. Each object is listed in chronological order of its discovery (multiple dates occur when the moments of imaging, observation, and publication differ), identified through its various designations (including temporary and permanent schemes), and the ...
In his work, The Republic (X.616E–617B), the Greek philosopher Plato provided the oldest known statement defining the order of the planets in Greek astronomical tradition. His list, in order of the nearest to the most distant from the Earth, was as follows: the Moon, Sun, Venus, Mercury, Mars, Jupiter, Saturn, and the fixed stars
United States V-2 [4] [5] 20 February 1947 First animals in space (fruit flies). United States V-2 [4] [6] 24 February 1949: First two-stage liquid-fueled rocket, that sets a record altitude of 244 miles (393 km) (WAC Corporal missile mounted onto a V-2 rocket). United States Bumper-5: 14 June 1949: First mammal in space (Albert II, a rhesus ...
Attempted Mars flyby (failed to attain correct trajectory) [52] [53] Mariner 4: 28 November 1964 First successful Mars flyby [54] [55] Zond 2: 30 November 1964 Mars flyby (contact lost) [46] [56] [57] Ranger 8: 17 February 1965 Lunar impact [58] [59] Voskhod 2: 18 March 1965 First space walk, by Alexei Leonov [51] [60] Ranger 9: 21 March 1965 ...
Mars is the fourth planet from the Sun.The surface of Mars is orange-red because it is covered in iron(III) oxide dust, giving it the nickname "the Red Planet". [22] [23] Mars is among the brightest objects in Earth's sky, and its high-contrast albedo features have made it a common subject for telescope viewing.
Mars I: 1877: Hall named his two newly discovered satellites of Mars Phobus and Deimus: Astronomische Nachrichten, Vol. 92, No. 2187, pp. 47/48 14 March 1878 (signed 7 February 1878). The names were subsequently amended to Phobos and Deimos. Deimos: Mars II 1880: Camille Flammarion: Triton: Neptune I: 1846
The History of Mars may be History of Mars observation; Geological history of Mars This page was last edited on 28 ...
A new distinct class of objects called dwarf planets was also decided. Pluto was redefined as a dwarf planet along with Ceres and Eris, formerly known as (2003) UB 313. Eris was named after the IAU General Assembly in 2006. [27] [28]