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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 achieve orbit.
The program started as a U.S. Army proposal to place a scientific satellite into orbit during the International Geophysical Year (1957–58). However, that proposal was rejected in favor of the U.S. Navy's Project Vanguard. The Explorer program was later reestablished to catch up with the Soviet Union after the launch of Sputnik 1 in October 1957.
The Explorer program became less of an advanced outdoor program, and more a broader program for older youth. They got a new advancement program leading to the Silver Award. Also, the minimum age was lowered to 14. [citation needed] In 1959, the Explorer Program became the Exploring program. Explorer advancement was dropped. In 1964, the Air ...
E. Exoplanetary Circumstellar Environments and Disk Explorer; Explorer 1; Explorer 2; Explorer 3; Explorer 4; Explorer 5; Explorer 6; Explorer 7; Explorer 8; Explorer 9
Explorer 1 was the first of the long-running Explorers program. Four follow-up satellites of the Explorer series were launched by the Juno I launch vehicle in 1958, of these, Explorer 3 and 4 were successful, while Explorer 2 and 5 failed to reach orbit.
Transiting Exoplanet Survey Satellite (TESS) is a space telescope for NASA's Explorer program, designed to search for exoplanets using the transit method in an area 400 times larger than that covered by the Kepler mission. [6]
Wide-field Infrared Survey Explorer (WISE, observatory code C51, Explorer 92 and MIDEX-6) was a NASA infrared astronomy space telescope in the Explorers Program launched in December 2009. [ 2 ] [ 3 ] [ 4 ] WISE discovered thousands of minor planets and numerous star clusters .
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