Soyuz Rocket Launch From Europe’s Spaceport In Kourou, French Guiana.
Soyuz Rocket Launch From Europe’s Spaceport In Kourou, French Guiana.
  • By Timothy Daniel (
  • 승인 2017.04.07 14:15
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Soyuz launch

While the exact launch date remains to be confirmed, Cheops is expected to be ready by the end of 2018 for shipping to Kourou, with all testing completed. Once in space, Cheops – the CHaracterising ExOPlanet Satellite – will target nearby, bright stars already known to have orbiting planets.

Through high-precision monitoring of a star’s brightness, scientists will examine the transit of a planet as it passes briefly across the star’s face. This allows the radius of the planet to be accurately measured. For those planets of known mass, the density will be revealed, providing an indication of the structure.

According to press of ESA on April 7 that These key features will help us to understand the formation of planets in the Earth-to-Neptune mass range. The mission will also contribute to ideas about how planets change orbits during their formation and evolution.

Cheops satellite

Cheops will also identify targets for habitability studies using future ground- and space-based telescopes, including the international James Webb Space Telescope being launched next year.

Cheops will operate in a 700 km altitude orbit around Earth angled about 98º to the equator. As it circles the globe from pole to pole, the satellite will ride the terminator between day and night such that it will always be directly above sunrise or sunset. This orbit offers stable temperatures and a constant solar illumination, keeping the solar array in sunlight while minimising the effects of stray light leaking into the telescope.

Cheops is an ESA mission in partnership with Switzerland and with important contributions from 10 other member states.

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