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CHEOPS - CHaracterising ExOPlanet Satellite - is the first mission dedicated to searching for exoplanetary transits by performing ultra-high precision photometry on bright stars already known to host planets. The mission's main science goals are to measure the bulk density of super-Earths and Neptunes orbiting bright stars and provide suitable targets for future in-depth characterisation studies of exoplanets in these mass and size ranges.

Watch online

Watch online

CHEOPS mission update
16 September 2019

Watch a replay of the media briefing on our CHEOPS exoplanet mission, which was held on Monday 16 September at the European Planetary Science Congress.

News

News

CHEOPS passes final review before shipment to launch site
29 July 2019The Characterising Exoplanet Satellite, CHEOPS, has successfully passed the final analysis review for its launch on a Soyuz rocket from Europe's Spaceport in Kourou, French Guiana.
How CHEOPS will investigate planet-hosting stars
18 July 2019As launch approaches for ESA's Characterising Exoplanet Satellite, CHEOPS, scientists are rounding off the observing plans for the mission, with the science themes of the core programme announced recently and proposals for guest observations for the first year of CHEOPS operations under evaluation.
Exoplanet satellite ready
29 March 2019ESA's Characterising Exoplanet Satellite, CHEOPS, was recently declared ready to fly after completing a series of final spacecraft tests.

Announcements

Announcements

CHEOPS AO-1 Programmes
24 July 2019Observing time on CHEOPS in the Guest Observers Programme has been awarded to 12 proposals received in response to the CHEOPS first Announcement of Opportunity (AO-1).

Spotlight On ...

Spotlight On ...

CHEOPS brochure
3 April 2019Find out more about CHEOPS, the CHaracterising ExOPlanet Satellite, and its mission to study planets beyond our Solar System.
CHEOPS paper model - Assemble your own planet watcher
20 March 2018Print out and build a paper model of CHEOPS, the CHaracterising ExOPlanet Satellite.

CHEOPS journals

CHEOPS journals

#17: Practice makes perfect for CHEOPS inflight operations
25 June 2019It takes collaboration and teamwork to operate a spacecraft. As the CHEOPS launch approaches, a Europe-wide team is preparing to take control of inflight activities once the satellite is in space.
#16: CHEOPS is ready for flight
11 March 2019Recent months on the CHEOPS mission have seen the completion of spacecraft testing and the conclusion of a very important review, which determined that the satellite is ready to fly.
#15: A jigsaw falling into place: CHEOPS end-to-end testing complete
12 February 2019After a successful series of tests, the team that will operate the CHEOPS mission is ready for the activities to follow the satellite launch later this year.

From Our Partners

From Our Partners

Space telescope CHEOPS leaves the University of Bern
5 April 2018Construction of the space telescope CHEOPS is finished. The engineers from the Center for Space and Habitability (CSH) at the University of Bern will package the instrument this week and send it to Madrid, where it will be integrated on the satellite platform.
The history of CHEOPS
7 December 2017Engineers at the University of Bern are developing the CHEOPS space telescope. From Earth's orbit, this telescope is supposed to measure the diameter of exoplanets which are light-years away from us and pass in front of their host star. Swiss astronomers had the idea for CHEOPS back in 2008.
CHEOPS children drawings engraved
2 October 2017Our campaign to collect CHEOPS children drawings is completing a major milestone as the first plaques have been engraved. The article tells the story of their production and illustrates the beautiful results.
Successful vibration test runs
28 August 2017During ten days in August 2017, the CHEOPS telescope had to withstand various tests on the shaker at the University of Bern simulating the conditions during the launch with a Soyuz rocket. The experiments were successful – a big step towards the completion of the flight model.

Featured Publications

Featured Publications

CHEOPS Definition Study Report (Red Book)
19 December 2013Reference: ESA/SRE(2013)7. This Definition Study Report (also known as the Red Book) presents the outcome of the CHEOPS Definition study. It describes the resulting mission concept that will fulfil the mission science requirements, and therefore allow us to achieve the science objectives presented in the original proposal, and further detailed...
22-Sep-2019 16:10 UT

ShortUrl Portlet

Shortcut URL

https://sci.esa.int/cheops

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