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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 ...
17 August 1970 First Venus lander and the first spacecraft to "soft" land on another planet (with some data returned from the surface) [18] [161] [162] Luna 16: 12 September 1970 First robotic lunar sample return [10] [163] Zond 8: 20 October 1970 Lunar flyby and return to Earth [46] [164] [165] Luna 17/Lunokhod 1: 10 November 1970 First remote ...
Eventually, new moons were discovered also around Uranus starting in 1787 by Herschel, [23] around Neptune starting in 1846 by William Lassell [24] and around Mars in 1877 by Asaph Hall. [25] Further apparent discrepancies in the orbits of the outer planets led Percival Lowell to conclude that yet another planet, "Planet X", must lie beyond ...
There are 293 confirmed moons in our cosmic neighborhood. By studying these worlds, astronomers hope to learn about ancient asteroid collisions, space volcanoes, and the origins of life itself.
However, the increasing number of moons that were being discovered in the 21st century caused the IAU to draw up a new scheme for the outer moons. At the IAU General Assembly in July 2004, [ 2 ] the WGPSN allowed satellites of Saturn to have names of giants and monsters in mythologies other than the Greco-Roman.
1577 – Tycho Brahe records the position of the Great Comet of that year as viewed from Uraniborg (in the island Hven, near Copenhagen) and compares it with that observed by Thadaeus Hagecius from Prague at the same time, giving deliberate consideration to the movement of the Moon. It was discovered that, while the comet was in approximately ...
1967 – Solar neutrino problem found; 1967 – Pulsars (rotating neutron stars) discovered; 1968 – Experimental evidence for quarks found; 1968 – Vera Rubin: Dark matter theories; 1970–73 – Standard Model of elementary particles invented; 1971 – Helium 3 superfluidity; 1971–75 – Michael Fisher, Kenneth G. Wilson, and Leo Kadanoff ...
Telescopic observations found new moons around Jupiter and Saturn, as well as an impressive ring system around the latter. In 1705 Edmond Halley asserted that the comet of 1682 is periodical with a highly elongated elliptical orbit around the Sun, and predicts its return in 1757. [86]