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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 .
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 ...
Date Event leading to space exploration Country Researcher(s) Ref(s). 1610 First telescopic observation of the night sky: discovery of the Galilean moons, lunar craters and the phases of Venus. Venice: Galileo Galilei: 1668 First reflecting telescope. England: Isaac Newton: 1781 First telescopic discovery of planet . Great Britain: William ...
The principal change was to space leap years differently so as to make the average calendar year 365.2425 days long, more closely approximating the 365.2422-day 'tropical' or 'solar' year that is determined by the Earth's revolution around the Sun. The reform advanced the date by 10 days: Thursday 4 October 1582 was followed by Friday 15 ...
solar sail technology development / interplanetary space exploration 2010-020E [19] Shin'en (UNITEC-1) UNISEC: failure technology development; contact lost shortly after launch [22] 2010-020F [21] Chang'e 2: CNSA: 25 August 2011 (arrive) – 15 April 2012 (end) Sun-Earth L2 point success Left the point on 15 April 2012, then flew by asteroid ...
The 51–52-year-old space probe is receding from the Sun at over 43,400 km/h (27,000 mph), [64] Since the start of the Space Age, a great deal of exploration has been performed by robotic spacecraft missions that have been organized and executed by various space agencies.
The Hubble Space Telescope, the first large optical telescope in orbit, is launched using the Space Shuttle, but astronomers soon discovered that it is crippled by a problem with its mirror. A complex repair mission in 1993 allows the telescope to start producing spectacular images of distant stars, nebulae, and galaxies.
The dates indicate the true age of the minerals only if the rocks have not been subsequently altered (see rubidium–strontium dating). [ 28 ] [ 29 ] Rubidium-82 , one of the element's non-natural isotopes, is produced by electron-capture decay of strontium-82 with a half-life of 25.36 days.