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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 ...
Planet Taphao Thong was discovered in 1996 and was one of the first exoplanets to be discovered. [48] The planet was the first long-period extrasolar planet discovered. The other planets were discovered later. [49] Nu 2 Lupi: Lupus: 15 h 21 m 49.57 s: −48° 19′ 01.1″ 5.65: 47: G2V: 0.906: 5664: 10.36: 3: One of the oldest stars in the ...
This was not only a direct, experimental proof of heliocentrism (James Bradley already did it in 1729 when he discovered the cause of the aberration of starlight is the Earth's motion around the Sun), [43] but also accurately revealed, for the first time, the vast distance between the Solar System and the closest stars.
HD 69830: Has a planetary system with three Neptune-mass planets. It is the first triple planetary system without any Jupiter-like planets discovered around a Sun-like star. All three planets were announced on May 18 by Lovis. All three orbit within 1 AU. The planets b, c and d have masses of 10, 12 and 18 times that of Earth, respectively.
First spacecraft beyond all Solar System planets. USA (NASA) Pioneer 10 [31] 7 February 1984: First untethered spacewalk (Bruce McCandless II). USA (NASA) STS-41-B: 25 July 1984: First spacewalk by a woman (Svetlana Savitskaya). USSR Salyut 7: 11 June 1985: First balloon deployed on another planet (Venus). USSR Vega 1: 11 September 1985
First planets discovered. [41] First hot Jupiter: 51 Pegasi b: 51 Pegasi: 1995 First planet discovered orbiting a main sequence star. First evaporating planet discovered HD 209458 b: HD 209458: 1999 First transiting planet. [41] First "free-floating" planet discovered [NB 1] S Ori 68 — 2000 ~5 M Jupiter [42] Isolated status needs confirmation ...
Scientists say they have found new evidence that there is a hidden planet in our solar system. For years, some astronomers have been suggesting that unusual behaviour on the edge of our solar ...
This is a timeline of Solar System exploration ordering events in the exploration of the Solar System by date of spacecraft launch. It includes: It includes: All spacecraft that have left Earth orbit for the purposes of Solar System exploration (or were launched with that intention but failed), including lunar probes .