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Mission

Kind: Solar observation

State: Operational

Place: Sun

Operator: ESA / NASA

Instruments: 1) Coronal Diagnostic Spectrometer, 2) Charge, Element, Isotope Analysis, 3) Suprathermal & Energetic Particle Analyzer, 4) Extreme UV Imaging Telescope, 5) Energetic and Relativistic Nuclei and Electron experiment, 6) Global Oscillations at Low Frequencies, 7) Large Angle Spectrometer Coronagraph, 8) Michelson Doppler Imager, 9) Solar UV Measurement of Emitted Radiation, 10) Solar Wind Anisotropies, 11) UV Coronagraph and Spectrometer, 12) Variability of Solar Irradiance,

Date

Start:

Duration: 2 years planned24 years, 11 months and 7 days elapsed

Mission Ending

"Life's like a movie, write your own ending. Keep believing, keep pretending." - Jim Henson

Rocket

Rocket: Atlas IIAS AC-121

Kind: ESA / NASA

Manufacturer: Matra Marconi Space

Mass: 1,850 kg (4,080 lb)

Launch Site: Cape Canaveral LC-36B

Flyby

"Requesting permission for flyby." Maverick - Top Gun

Orbit

Reference System: Sun–Earth L1

Lander

"The journey, not the arrival, matters; the voyage, not the landing." - Paul Theroux



The Solar and Heliospheric Observatory (SOHO) is a spacecraft built by a European industrial consortium led by Matra Marconi Space (now Airbus Defence and Space) that was launched on a Lockheed Martin Atlas II AS launch vehicle on December 2, 1995, to study the Sun. It has also discovered over 3,000 comets. It began normal operations in May 1996. It is a joint project between the European Space Agency (ESA) and NASA. Originally planned as a two-year mission, SOHO continues to operate after over 25 years in space, the mission has been extended until the end of 2020 with a likely extension until 2022. In addition to its scientific mission, it is a main source of near-real-time solar data for space weather prediction. Along with Wind, ACE, and DSCOVR, SOHO is one of four spacecraft in the vicinity of the Earth–Sun L1 point, a point of gravitational balance located approximately 0.99 astronomical units (AU) from the Sun and 0.01 AU from the Earth. In addition to its scientific contributions, SOHO is distinguished by being the first three-axis-stabilized spacecraft to use its reaction wheels as a kind of virtual gyroscope, the technique was adopted after an on-board emergency in 1998 that nearly resulted in the loss of the spacecraft.

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