Explorer program Explorer program Advanced Composition Explorer (ACE) is an Explorer satellite mission to study matter in situ, comprising energetic particles from the solar wind, the interplanetary medium, and other sources. It was launched in 1997 and is currently operating at the L1 Lagrange point. ...more on Wikipedia about "Advanced Composition Explorer"
(COBE)
Explorer-II was to be a repeat of the Explorer I mission. However, there was a launch failure in the Jupiter-C rocket and Explorer II did not reach orbit. ...more on Wikipedia about "Explorer 2"
Explorer-III was nearly identical to Explorer I in design and mission. ...more on Wikipedia about "Explorer 3"
Explorer 32 was a satellite launched by the United States on 25 May 1966 to study the upper atmosphere. ...more on Wikipedia about "Explorer 32"
Explorer 35 was a spin-stabilized spacecraft instrumented for interplanetary studies, at lunar distances, of the interplanetary plasma, magnetic field, energetic particles, and solar X rays. It was launched into an elliptical lunar orbit. The spin axis direction was nearly perpendicular to the ecliptic plane, and the spin rate was 25.6 rpm. Mission objectives were achieved. After successful operation for 6 years, the spacecraft was turned off on June 24, 1973. ...more on Wikipedia about "Explorer 35"
Explorer 4 was a US satellite launched on July 26, 1958. It was instrumentated by Dr. James van Allen's group. The Department of Defense's Advanced Research Projects Agency had initially planned two satellites for the purposes of studying the Van Allen radiation belts and the effects of nuclear explosions upon these belts (and the Earth's magnetosphere in general), however Explorer IV was the only such satellite launched. ...more on Wikipedia about "Explorer 4" shortopedia for you!
Explorer 6 was a US satellite launched on August 7, 1959. ...more on Wikipedia about "Explorer 6"
Explorer 7 was launched October 13, 1959. It was designed to measure solar X-ray and Lyman-alpha flux, trapped energetic particles, and heavy primary cosmic rays. ...more on Wikipedia about "Explorer 7"
Explorer-I, officially known as Satellite 1958 Alpha, was the first United States Earth satellite and was sent aloft as part of the United States program for the International Geophysical Year 1957-1958. It was designed and built by the Jet Propulsion Laboratory (JPL) of the California Institute of Technology under the direction of Dr. William H. Pickering. The satellite instrumentation of Explorer-I was designed and built by Dr. James Van Allen of the State University of Iowa. ...more on Wikipedia about "Explorer I"
The Explorer program was the United States's first successful attempt to launch an artificial satellite . It began as a U.S. Army proposal to place a scientific satellite into orbit during the International Geophysical Year. That proposal was rejected in favor of the U.S. Navy's Project Vanguard. It was revived as a crash program to catch up with the Soviet Union after that nation's launch of Sputnik I on October 4, 1957. (See: Sputnik crisis) Explorer 1 was launched January 31 1958. Besides being the first U.S. satellite, it is known for discovering the Van Allen radiation belt. ...more on Wikipedia about "Explorer program"
International Ultraviolet Explorer (IUE) was an astronomical observatory satellite primarily designed to take ultraviolet spectra. The satellite was a collaborative project between NASA, the U.K. Science Research Council and the European Space Agency (ESA). ...more on Wikipedia about "International Ultraviolet Explorer"
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