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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 ...
Pluto was, however, found to be too small to have disrupted the orbits of the outer planets, and its discovery was therefore coincidental. Like Ceres, it was initially considered to be a planet, but after the discovery of many other similarly sized objects in its vicinity it was reclassified in 2006 as a dwarf planet by the IAU. [22]
Interplanetary space investigations [15] [16] Venera 1: 12 February 1961 First probe to another planet; Venus flyby (contact lost before flyby) [17] [18] [19] Vostok 1: 12 April 1961 First crewed Earth orbiter (Yuri Gagarin) [20] [21] Ranger 1: 23 August 1961 Attempted lunar test flight (failed to leave Earth orbit) [22] [23] [24] Ranger 2: 18 ...
NASA's James Webb Space Telescope has captured a fresh view of the Pillars of Creation, a star-forming region that has become a famed celestial sight.
USA (NASA) Pioneer 5: 19 August 1960: First plants and animals to return alive from Earth orbit. USSR Sputnik 5: 25 September 1960 First rocket engine fired in space. USA (NASA) Pioneer P-30 [13] 31 January 1961: First hominidae in space (chimpanzee Ham). First tasks performed in space. USA (NASA) M-R 2: 12 February 1961
On 15 April 2019, TESS' first discovery of an earth-sized planet was reported. HD 21749 c is a planet described as "likely rocky", with about 89% of Earth's diameter and orbits the K-type main sequence star HD 21749 in about 8 days. The planet's surface temperature is estimated to be as high as 427 °C.
NASA released a timelapse video that shows the eye of Hurricane Milton as seen from the International Space Station orbiting 275 miles above Earth.
The Discovery Program is a series of Solar System exploration missions funded by the U.S. National Aeronautics and Space Administration (NASA) through its Planetary Missions Program Office. The cost of each mission is capped at a lower level than missions from NASA's New Frontiers or Flagship Programs. As a result, Discovery missions tend to be ...