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First extrasolar planet discovered by indirect imaging (visible light) Found in 2020 to be a debris cloud from a collision of asteroids rather than a planet 2015 NameExoWorlds Tadmor: Ancient Palmyrene and modern Arabic name for Palmyra: Gamma Cephei A (Errai) 1.85 903.3 2.05 radial vel. 2003 45.0 1.4 2015 NameExoWorlds Meztli
Pioneer 10. Pioneer 10. 3 March 1972[ 2] Atlas SLV-3C Centaur-D [ 3] NASA. Flyby. Successful [ 4] Humanity's first object to attain Solar system's escape velocity. First probe to traverse the asteroid belt, to reach Jovanian system, to use a gravity assist and to leave the proximity of Solar systems' planets.
Another Trans-Neptunian planet at 1,500 AU away from the Sun, proposed by Rodney Gomes in 2012 [20] Theia or Orpheus, [21] a Mars-sized impactor believed to have collided with the Earth roughly 4.5 billion years ago; an event which created the Moon. Evidence from 2019 suggests that it may have originated in the outer Solar System. [22]
Soviet cosmonaut Yuri Gagarin—the first person in outer space.. The Soviet space program [2] (Russian: Космическая программа СССР, romanized: Kosmicheskaya programma SSSR) was the state space program of the Union of Soviet Socialist Republics (USSR), active from 1955 until the dissolution of the Soviet Union in 1991.
The number of dwarf planets in the Solar System is unknown. Estimates have run as high as 200 in the Kuiper belt [1] and over 10,000 in the region beyond. [2] However, consideration of the surprisingly low densities of many large trans-Neptunian objects, as well as spectroscopic analysis of their surfaces, suggests that the number of dwarf planets may be much lower, perhaps only nine among ...
A poster of the planets and moons visited during the Voyager program. The Voyager program is an American scientific program that employs two interstellar probes, Voyager 1 and Voyager 2. They were launched in 1977 to take advantage of a favorable alignment of the two gas giants Jupiter and Saturn and the ice giants, Uranus and Neptune, to fly ...
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