List of European Space Agency programs and missions
The European Space Agency (ESA) operates a number of missions, both operational and scientific, including collaborations with other national space administrations such as the Japanese JAXA, the American NASA, and the Chinese CNSA. Their portfolio of missions also include many public-private partnership missions, a number of which with European satellite operators EUMETSAT, Eutelsat, and Inmarsat.
A staple of the ESA's Science Doctrine is the Cosmic Vision programme, a series of space science missions chosen by the ESA to launch through competitions, similar to NASA's Discovery and New Frontiers programmes. It succeeds the Horizon 2000 and Horizon 2000+ programmes which launched notable missions such as Huygens, Rosetta and Gaia. Each space science mission are divided into two categories: "Sun and Solar System", missions studying the solar system, and "Astrophysics", missions studying interstellar astronomy. A similarly-operated programme focused on Earth observation, known as the Living Planet Programme, has launched various "Earth Explorers" such as GOCE and Swarm, which serve many forms of Geoscience individually. A number of missions by the ESA have also launched and operated outside of a canonical programme, as is the case with missions such as Giotto, Ulysses, and Mars Express.
The Horizon 2000 program was a former long-term plan originally drafted by the European Space Agency in 1984, which focused on funding and developing new science missions, and also maintaining contemporary ones. The program, while providing funding for already-launched missions and those in late development such as the International Ultraviolet Explorer, Hipparcos and Ulysses, supported a series of brand new missions, divided into large-budget ventures known as "cornerstone" missions, and medium-sized missions known colloquially as "blue missions". The plan originally called for three cornerstone missions throughout the lifespan of the program, however, the Solar-Terrestrial Science Program, which consisted the Solar and Heliospheric Observatory (SOHO) and Cluster missions, were adopted into the Horizon 2000 plan, becoming the first of four cornerstone missions. XMM-Newton was selected as the second cornerstone mission of the program, while Rosetta and FIRST were selected in November 1993 as the third and fourth cornerstone missions, with the latter mission eventually being rechristened the Herschel Space Observatory.
Part of the Horizon 2000 program was also a class of medium-sized missions known as "blue missions" – their name deriving from the colour of the box that represents them in the original Horizon 2000 proposal diagram from 1984. The Huygens lander, a component of the Cassini–Huygens mission, became the first designated medium-sized mission of the Horizon 2000 program, after its selection in November 1988. INTEGRAL was chosen as the succeeding medium-sized mission in June 1993, followed three years later by the selection of COBRAS/SAMBA, later rechristened Planck, as the third medium-sized mission in July 1996. As of December 2016, four Horizon 2000 missions, including three cornerstone and one medium-sized mission, remain operational.
- Cornerstone missions
- Cornerstone 1 – SOHO, launched December 1995, operational – Joint ESA-NASA Solar observation mission aimed at providing real-time data for space weather forecasting.
- Cornerstone 1 – Cluster, launched June 1996, failed – Earth observation mission focused on the planet's magnetosphere, using a constellation of four identical spacecraft. Failed on launch.
- Cornerstone 2 – XMM-Newton, launched December 1999, operational – The first ever X-ray space observatory, focused on studying interstellar X-ray sources.
- Cornerstone 3 – Rosetta, launched March 2004, completed – 67P/Churyumov–Gerasimenko orbiter mission, studying comets and their evolution.
- Cornerstone 4 – Herschel, launched May 2009, completed – Infrared space observatory mission for general astronomy.
- Medium-sized missions
- Medium 1 – Huygens, launched October 1997, completed – Titan lander component of the Cassini–Huygens mission; first landing in the outer solar system.
- Medium 2 – INTEGRAL, launched October 2002, operational – Gamma ray space observatory, also capable of observing X-ray and visible wavelengths.
- Medium 3 – Planck, launched May 2009, completed – Cosmology mission that mapped the cosmic microwave background and its anisotropies.
- Gaia, launched December 2013, operational – Astrometry mission aimed at measuring the positions and distances of over one billion astronomical objects in the Milky Way.
- LISA Pathfinder, launched December 2015, operational – Demonstration mission aimed at testing technologies for the proposed eLISA Gravitational-wave observatory mission.
- BepiColombo, launching October 2018, future – Joint ESA-JAXA mission to orbit Mercury using two spacecraft, performing a reconnaissance of the planet.
- S-class missions
- S1 – CHEOPS, launching 2018, future – Space observatory mission focused on studying known exoplanets.
- S2 – SMILE, launching 2021, future – Joint ESA-CAS Earth observation mission, studying the interaction between the planet's magnetosphere and solar wind.
- M-class missions
- M1 – Solar Orbiter, launching October 2018, future – Solar observatory mission, designed to perform in-situ studies of the Sun at a perihelion of 0.28 astronomical units.
- M2 – Euclid, launching 2020, future – Visible and near-infrared space observatory mission focused on dark matter and dark energy.
- M3 – PLATO, launching 2024, future – Kepler-like space observatory mission, aimed at discovering and observing exoplanets.
- M4 – to be announced
- M5 – to be announced
- L-class missions
- L1 – JUICE, launching 2022, future – Jupiter orbiter mission, focused on studying the Galilean moons Europa, Ganymede and Callisto.
- L2 – ATHENA, launching 2028, future – X-ray space observatory mission, designed as a successor to the XMM-Newton telescope.
- L3 – to be announced
Living Planet Programme
- Core missions
- Earth Explorer 1 – GOCE, launched March 2009, completed — Gravimetry mission, aimed at accurately mapping Earth's gravity field.
- Earth Explorer 5 – ADM-Aeolus, launching 2017, future – Meteorology mission, performed by a spacecraft equipped to create global wind component profiles to aid more advanced weather forecasting.
- Earth Explorer 6 – EarthCARE, launching 2018, future – Meteorology and climatology mission, aimed at the characterization of clouds and aerosols, along with measurements of reflected and emitted radiation from Earth's surface.
- Earth Explorer 7 – Biomass, launching 2020, future – Ecology mission, studying the carbon cycle and forest ecology, observing the development of forests and their characteristics.
- Opportunity missions
- Earth Explorer 2 – SMOS, launched November 2009, operational — Climatology mission, focused on studying Earth's water cycle and climate.
- Earth Explorer 3 – CryoSat-2, launched April 2010, operational — Environmental science and glaciology mission, focused on studying Earth's polar ice caps. Successful relaunch of the failed CryoSat mission.
- Earth Explorer 4 – Swarm, launched November 2013, operational — Magnetosphere mission, carried out by a trio of spacecraft launched to study Earth's magnetic field.
- Earth Explorer 8 – FLEX, launching 2022, future – Biology mission, aimed at measuring the amount of Chlorophyll fluorescence in terrestrial vegetation.
- Earth Explorer 9 – to be announced
- ARD, launched October 1998 – Demonstration mission to test new technologies in atmospheric entry design.
- COROT, launched December 2006 – CNES-led space observatory mission to search for rocky exoplanets and perform asteroseismology studies.
- COS-B, launched August 1975 – Gamma-ray space observatory mission organized by the European Space Research Organisation, a precursor to the ESA. The first mission launched by the ESA.
- CryoSat, launched October 2005 – Environmental science and glaciology mission, focused on studying Earth's polar ice caps. Failed on launch, and relaunched as CryoSat-2 in the Living Planet Programme.
- Double Star, launched December 2003 and July 2004 – Joint CNSA-ESA Earth observation mission to study the planet's magnetosphere, complimenting the Horizon 2000 Cluster mission.
- ECS family, launched June 1983 to July 1988 – Joint Eutelsat-ESA mission to launch the first generation of EUTELSAT telecommunication satellites.
- Envisat, launched March 2002 – Earth observation mission focused on environmental studies, using the largest civilian Earth observation satellite ever launched.
- ERS-1 and ERS-2, launched July 1991 and April 1995 — ESA's first Earth observation missions.
- EURECA, launched August 1992 — microgravity testbed mission carrying a suite of fifteen instruments from various European national space administrations.
- EXOSAT, launched May 1983 – ESA's first X-ray space observatory mission.
- GEOS-1 and GEOS-2, launched April 1977 and July 1978 — Magnetospheric reconnaissance mission, consisting experimental payloads by various European national space administrations.
- Giotto, launched July 1985 – First interplanetary mission by the ESA, aimed at performing the first comet flyby, of Comet Halley. Part of the canonical Halley Armada.
- GIOVE-A, launched December 2005 – Demonstration mission testing technologies for the Galileo satellite navigation system.
- Hipparcos, launched August 1989 – First astrometry mission ever launched, focused on cataloguing over 118,200 starts in the eponymous Hipparcos Catalogue, published in 1997.
- ISEE-2, launched October 1977 - ESA component of the Joint NASA-ESA International Sun-Earth Explorer series of magnetospheric observations.
- ISO, launched November 1995 – Infrared space observatory mission for general astronomy.
- IXV, launched February 2005 – Experimental suborbital re-entry vehicle; demonstration mission for reusable launchers.
- IUE, launched January 1978 – Joint NASA-ESA-SERC ultraviolet space observatory mission for general astronomy.
- MARECS family, launched December 1981 to November 1984 - Joint Inmarsat-ESA program which launched a satellite duo to create a global maritime communications network. MARECS B failed on launch.
- Olympus, launched July 1989 – telecommunications mission pioneering high-power transmitters, multi-spot beam Ka band technology and on-board switching.
- OTS-1 and OTS-2, launched September 1997 and May 1978 – Demonstration mission for a geostationary communications satellite system. OTS-1 lost in a launch failure.
- SSETI Express, launched October 2005 – Student demonstration mission, sponsored by the ESA Education Office, which launched three CubeSats to take pictures of the Earth and serve as a radio transponder.
- Schiaparelli, launched March 2016 – Demonstration mission for landing technologies designed for the ExoMars surface platform. Failed upon landing on Mars.
- SMART-1, launched September 2003 – Demonstration mission for solar electric propulsion, manifesting in a lunar orbiter mission carrying low-cost, minaturised instruments.
- Ulysses, launched October 1990 – Joint ESA-NASA Solar observatory mission, employing a spacecraft in a polar heliocentric orbit.
- Venus Express, launched November 2005 – Venus orbiter mission, focused on long-term study and observation of its atmosphere from polar cytherocentric orbit.
- YES2, launched September 2007 – Student demonstration mission, sponsored by the ESA Education Office, which deployed a 31.7 km-long space tethered constellation of satellites. Partial launch failure.
- Alphasat, launched July 2013 – Joint Inmarsat-ESA mission to launch an advanced geostationary communication satellite to serve Africa, Asia and Europe; the largest ever built by Europe.
- Artemis, launched July 2001 – Telecommunications mission. Ownership of the spacecraft transferred to Avanti in January 2014.
- EDRS, launched January 2016 to 2017 – Geosynchronous optical communication network consisting a constellation of two satellites, EDRS-A and EDRS-C.
- Galileo, launched October 2011 onward - Joint ESA-GSA geodesy project to create an indigenous global navigation satellite system independent of the Russian GLONASS, Chinese BeiDou and American GPS systems.
- GIOVE-B, launched April 2008 – Second demonstration mission testing technologies for the Galileo satellite navigation system.
- Hubble Space Telescope, launched April 1990 – Joint NASA-ESA-STScl space observatory mission, carried out by a near ultraviolet, visible, and near infrared telescope.
- Mars Express, launched June 2003 – Mars orbiter mission focused on observing the planet through high-resolution imagery and conducting research of the planet's interaction with the solar system.
- Meteosat (first generation), launched November 1977 to September 1997 – Joint EUMETSAT-ESA meteorology mission consisting seven geostationary satellites launched over a period of twenty years.
- MSG, launched January 2004 to July 2015 – Joint EUMETSAT-ESA meteorology mission to launch the second generation of Meteosat satellites, of which four were launched over a period of eleven years.
- MetOp (first generation), launched October 2006 to 2018 – Joint EUMETSAT-ESA operational meteorology mission consisting three satellites launched over a period of twelve years.
- Proba-1, launched October 2001 – Microsatellite earth observation and Low Earth Orbit technology demonstration mission for various new instruments.
- Proba-2, launched November 2009 – Microsatellite earth observation and Low Earth Orbit technology demonstration mission, serving as the second flight in the Proba series.
- Proba-V, launched May 2013 – Microsatellite earth observation mission focused on mapping land cover and vegetation growth across Earth in bi-daily cycles; the third mission in the Proba series.
- Sentinel family, launched April 2014 onward – Suite of Earth observation missions serving as the ESA's contribution to the European Commission's Copernicus Programme.
- Trace Gas Orbiter, launched March 2016 – Mars orbiter component of the ExoMars astrobiology mission, focused on observing methane in the planet's atmosphere for clues to past or present life on Mars.
- Electra, launching July 2021 – Joint ESA-SES telecommunications mission, utilizing a spacecraft with electrical-powered propulsion.
- ExoMars rover, launching July 2020 – ESA component of the joint Roscosmos-ESA ExoMars 2020 Mars lander mission. Planned to be the first European Mars rover.
- James Webb Space Telescope, launching October 2018 – Joint NASA-ESA-CSA infrared space observatory mission for general astronomy and cosmology.
- MetOp-SG, launching ~2021 onward – Joint EUMETSAT-ESA operational meteorology mission, launching the second generation of MetOp satellites, of which a constellation of six will be launched.
- MTG, launching ~2020 — Joint EUMETSAT-ESA meteorology mission to launch the third generation of Meteosat satellites.
- Proba-3, launching late 2018 – Microsatellite solar observation and formation flying demonstration mission, serving as the fourth flight in the Proba series.
- AIDA, proposed launches in October 2020 and July 2021 – Joint NASA-ESA Asteroid deflection test mission, aimed at studying the effects of an asteroid imapct, with 65803 Didymos's moon as a target.
- EChO – Space observatory mission aimed at exoplanetary science, employing high resolution, multi-wavelength spectroscopic observations. Finalist for the M3 slot in the Cosmic Vision programme, but lost to PLATO.
- eLISA, proposed launch in 2034 – Gravitational-wave observatory mission, currently competing for the L3 slot in the Cosmic Vision programme, designed to detect gravitational waves using a heliocentric constellation of three spacecraft.
- LOFT – X-ray space observatory mission focused on the study of high-mass objects such as black holes and neutron stars. Finalist for the M3 slot in the Cosmic Vision programme, but lost to PLATO.
- Lunar Lander, proposed launch in 2018 – Demonstration mission aimed at testing new technologies in lunar landing, including autonomous redirects. Project put on hold due to lack of financial support, as of 2012.
- Marco Polo – a sample-return mission focused on collecting and returning a sample from a Near-Earth object. Proposed for the M1, M2, M3 and M4 missions of the Cosmic Vision programme, it has since been rejected all four times.
- ODINUS – A dual Uranus and Neptune orbital mission. Proposed for the L2 and L3 missions of the Cosmic Vision programme, but eliminated from the running both times.
- STE-QUEST – Astrophysics demonstration mission focused on testing the equivalence principle. Finalist for the M3 slot in the Cosmic Vision programme, but lost to PLATO.
- Darwin – Proposed exoplanetary science mission focused on directly detecting Earth-like exoplanets. Proposed as a cornerstone for the Horizon 2000+ programme, but abandoned in 2007.
- Don Quijote – Concept for a demonstration mission, testing technologies in asteroid deflection. Abandoned after lack of interest from the ESA.
- Eddington – Concept for an asteroseismology mission designed to detect exoplanets. Cancelled in 2003.
- EXPERT – Concept for a flying hypersonic wind tunnel with cooperation with Roscosmos. Indefinitely postponed since 2012, due to Roscosmos' withdrawal from the project.
- Hermes – Proposed human spaceflight program centered around a CNES-designed reusable spaceplane. Project cancelled in 1992 due to difficulties with achieving financial and scientific goals.
- Hopper – Successor concept to Hermes. Cancelled in 2005 after lack of interest.
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