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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 ...
1845 – John Adams predicts the existence and location of an eighth planet from irregularities in the orbit of Uranus. [138] 1845 – Karl Ludwig Hencke discovers a fifth body between Mars and Jupiter, Astraea [139] and, shortly thereafter, new objects were found there at an accelerating rate.
First spacecraft to impact another planet (Mars). USSR Mars 2: 2 December 1971: First soft landing on Mars. First signals from Martian surface. First photograph from Martian surface. USSR Mars 3: 3 March 1972: First spacecraft on a trajectory out of the solar system. First spacecraft to use all-nuclear electrical power (SNAP-19 RTGs). USA (NASA ...
The Mars 1M programs (sometimes dubbed Marsnik in Western media) was the first Soviet uncrewed spacecraft interplanetary exploration program, which consisted of two flyby probes launched towards Mars in October 1960, Mars 1960A and Mars 1960B (also known as Korabl 4 and Korabl 5 respectively).
The Mars 2020 mission, consisting of the rover Perseverance and helicopter Ingenuity, was launched on July 30, 2020, and landed in Jezero crater on Mars on February 18, 2021. [1] As of November 13, 2024, Perseverance has been on the planet for 1328 sols (1364 total days; 3 years, 269 days).
This is a timeline of Solar System exploration ordering events in the exploration of the Solar System by date of spacecraft launch. 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. A small number of pioneering or notable ...
As of 2022, three bodies in the Solar System, the Moon, Mars and Ryugu [71] have been visited by mobile rovers. The first robotic rover to visit another celestial body was the Soviet Lunokhod 1, which landed on the Moon in 1970. The first to visit another planet was Sojourner, which travelled 500 metres across the surface of Mars in 1997.
The Solar System travels alone through the Milky Way in a circular orbit approximately 30,000 light years from the Galactic Center. Its speed is about 220 km/s. The period required for the Solar System to complete one revolution around the Galactic Center, the galactic year, is in the range of 220–250 million years. Since its formation, the ...