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Explorer 1 was the first satellite launched by the United States in 1958 and was part of the U.S. participation in the International Geophysical Year (IGY). The mission followed the first two satellites, both launched by the Soviet Union during the previous year, Sputnik 1 and Sputnik 2 .
An Explorer mission observes Sagittarius A*, the Milky Way's central black hole, flaring. The Explorers program [1] is a NASA exploration program that provides flight opportunities for physics, geophysics, heliophysics, and astrophysics investigations from space. Launched in 1958, Explorer 1 was the first spacecraft of the United States to ...
Although Juno I's launch of the Explorer 1 satellite was a huge success for the U.S. space program, only two of its remaining five flights were successful, Explorer 3 and Explorer 4, [1] giving the Juno I vehicle a mission total success ratio of 50%. [4] The Juno I vehicle was replaced by the Juno II in 1959.
Vanguard 1. Expected to de-orbit in ~2240AD, this and its upper launch stage are the oldest human-made objects in space. Also the first use of solar cells to power a satellite. [1] 1.47 kg (3.25 lb) March 26 US: Explorer 3: Juno I: Success: Added to data received by Explorer 1. [1] 14.1 kg (31.0 lb) April 29 US: Vanguard 2A: Vanguard TV-5: Failure
Explorer 1 was the first American satellite to reach orbit on 31 January 1958. 1958 in spaceflight; Timeline of spaceflight
Explorer-1 [Prime], also known as E1P and Electra, [1] was a CubeSat-class picosatellite built by the Space Science and Engineering Laboratory (SSEL) [2] at Montana State University. It was launched aboard a Taurus-XL rocket from Vandenberg Air Force Base , California on 4 March 2011, [ 3 ] but failed to achieve orbit after the rocket ...
Sputnik 1, while the first satellite ever launched, did not conduct Earth science. Explorer 1 was the first satellite to make an Earth science discovery when it found the Van Allen belts . This list is incomplete ; you can help by adding missing items .
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