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Skylab was a space station launched and operated by NASA (the space agency of the United States) and was the U.S.'s first space station. Skylab orbited the Earth from 1973…
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Skylon is a design for a spaceplane by the British company Reaction Engines Limited (REL). It uses SABRE, a combined-cycle, air-breathing rocket engine, to reach orbit in a single stage.…
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Skynet is a family of military satellites, now operated by Paradigm Secure Communications on behalf of the UK Ministry of Defence, which provide strategic communication services to the three branches…
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The Sloan Digital Sky Survey or SDSS is a major multi-filter imaging and spectroscopic redshift survey using a dedicated 2.5-m wide-angle optical telescope at Apache Point Observatory in New Mexico, …
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SMART-1 was the first European Lunar mission and a technology demonstrator of Deep Space Electric Propulsion. It was launched in October 2003, reached the moon observation orbit in 2005 and…
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SMOS — the second Earth Explorer mission launched on November 2009 designed to measure Soil Moisture and Ocean Salinity. The Soil Moisture and Ocean Salinity Satellite (SMOS) is a part…
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The Stratospheric Observatory for Infrared Astronomy (SOFIA) is a joint project of NASA and the German Aerospace Center ( DLR) to construct and maintain an airborne observatory. NASA awarded the…
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The Solar and Heliospheric Observatory (SOHO) mission purpose is to study the Sun from a point of gravitational balance. The SOHO spacecraft has been built by a European industrial consortium…
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SOHO is an ESA/NASA collaborative mission within ESA's `Solar Terrestrial Science Program' (STSP), and it is also part of ISTP (International Solar Terrestrial Physics Program). So far, SOHO represents the…
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Solar Orbiter (SolO) is a planned Sun-observing satellite, under development by the European Space Agency (ESA). The main mission scenario is a launch by a NASA EELV or an Atlas…
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Solar Orbiter (SolO) is a planned Sun-observing satellite, under development by the European Space Agency (ESA). The main mission scenario is a launch by an Atlas V from the Kennedy…
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Synoptic Optical Long-term Investigations of the Sun (SOLIS) is a new synoptic facility for solar observations over a long time frame that is funded by the National Science Foundation (NSF)…
