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Science & Exploration

Cheops observing in space

23/11/2018 517 views 0 likes 412026 ID 00:00:44
English
  • MP4 [5.42 MB]
  • SOURCE MP4 [54.10 MB]

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Animation visualising ESA's CHaracterising ExOPlanet Satellite, Cheops, in orbit above Earth.

In this view the satellite's telescope points to several different stars, one after the other. The beam represents the light from the star that Cheops is observing at a given point in time.

Cheops will orbit Earth at an altitude of 700 km in a Sun-synchronous orbit, riding on the day-night terminator – such a configuration is also called dawn/dusk orbit. This orbit allows Cheops to point its instrument always towards the night side of Earth, in order to limit the impact on the measurements of sunlight and reflected stray light from Earth.

To maximize the fraction of the sky where Cheops can perform observations, the instrument can be pointed at any time anywhere in the sky up to 60 degrees from the anti-Sun direction.

Cheops will make observations of exoplanet-hosting stars to measure small changes in their brightness due to the transit of a planet across the star's disc. The information will enable accurate and precise measurements of the sizes of the orbiting planets to be made. Cheops will target stars hosting planets in the super-Earth to Neptune size range. By combining sizes with existing measurements of the planet masses, Cheops will provide an estimate of bulk density – a first step towards characterising planets outside our Solar System.

Note: Some aspects have been simplified for the purpose of this animation.

  • ESA/ATG medialab
  • Closed captions available Captions and subtitles are available (automatically generated by YouTube) - select your language using the YouTube player controls. A non-YouTube version is available using the 'download' and 'source' buttons below.
  • Animation
  • Space Science
  • CHEOPS
  • Astronomy Astronomy & Fundamental Physics Exoplanet Exoplanet Hunter Exoplanets star Stars
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