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| mission_type = Cassini: Saturn orbiter Huygens: Titan lander | operator = NASA/JPLESAASI | website = * * * | COSPAR_ID = 1997-061A | SATCAT = 25008 | mission_duration = Elapsed: from launch at Saturn En route: 7 years Primary mission: 4 years Extended missions: Equinox: 2 years Solstice: 3 years elapsed Expected end of life: 2017 | manufacturer = | dry_mass = 〔(【引用サイトリンク】title=Cassini–Huygens:Quick Facts )〕 | launch_mass = | power = ~880 watts (BOL) ~670 watts (2010)〔 | launch_date = UTC | launch_rocket = Titan IV(401)B | launch_site = Cape Canaveral SLC-40 | launch_contractor = | last_contact = | decay_date = | orbit_epoch = | orbit_reference = Kronocentric | orbit_periapsis = | orbit_apoapsis = | orbit_inclination = | orbit_period = | apsis = krone |interplanetary = }} ''Cassini–Huygens'' is an unmanned spacecraft sent to the planet Saturn. It is a flagship-class NASA–ESA–ASI robotic spacecraft.〔 ''Cassini'' is the fourth space probe to visit Saturn and the first to enter orbit, and its mission is ongoing . It has studied the planet and its many natural satellites since arriving there in 2004. Development started in the 1980s. Its design includes a Saturn orbiter, and a lander for the moon Titan. The lander, called ''Huygens'', landed on Titan in 2005. The two-part spacecraft is named after astronomers Giovanni Cassini and Christiaan Huygens. The spacecraft launched on October 15, 1997 aboard a Titan IVB/Centaur and entered orbit around Saturn on July 1, 2004, after an interplanetary voyage that included flybys of Earth, Venus, and Jupiter. On December 25, 2004, ''Huygens'' separated from the orbiter and reached Saturn's moon Titan on January 14, 2005. It entered Titan's atmosphere and descended to the surface. It successfully returned data to Earth, using the orbiter as a relay. This was the first landing ever accomplished in the outer Solar System. == Overview == Sixteen European countries and the United States make up the team responsible for designing, building, flying and collecting data from the ''Cassini'' orbiter and ''Huygens'' probe. The mission is managed by NASA’s Jet Propulsion Laboratory in the United States, where the orbiter was assembled. Huygens was developed by the European Space Research and Technology Centre. The Centre's prime contractor, Aérospatiale of France (now Thales Alenia Space), assembled the probe with equipment and instruments supplied by many European countries (Huygens' batteries and two scientific instruments by the United States). The Italian Space Agency (ASI) provided the ''Cassini'' orbiter's high-gain radio antenna, with the incorporation of a low-gain antenna (that ensure telecommunications with the Earth for the entire duration of the mission), a compact and lightweight radar, which also uses the high-gain antenna and serves as a synthetic aperture radar, a radar altimeter, a radiometer, the radio science subsystem (RSS), the visible channel portion VIMS-V of VIMS spectrometer. The VIMS infrared counterpart was provided by NASA, as well as Main Electronic Assembly, which includes electronic subassemblies provided by CNES of France. On April 16, 2008, NASA announced a two-year extension of the funding for ground operations of this mission, at which point it was renamed to the Cassini Equinox Mission. This was again extended in February 2010 with the Cassini Solstice Mission. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Cassini–Huygens」の詳細全文を読む スポンサード リンク
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