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Cheops - Space Mission
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Cheops

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description Cheops Overview

Cheops (Characterising Exoplanet Satellite) is a European Space Agency space telescope launched in December 2019, developed under Swiss leadership. Unlike surveys designed to find new planets, Cheops is specifically built to observe bright stars already known to host exoplanets, measuring their precise sizes using high-precision photometry. By combining these size measurements with existing mass data, astronomers can determine the bulk density of these planets. The mission serves the astrophysics community by characterizing the nature of exoplanets ranging from Earth-like to Neptune-sized.

help Cheops FAQ

What does the CHEOPS space mission study?

CHEOPS means Characterising Exoplanet Satellite and studies exoplanets that orbit bright stars already known to host planets. Its main job is to measure planetary sizes accurately when they pass in front of their stars.

When and where was CHEOPS launched?

CHEOPS launched in December 2019 from Europe's Spaceport in French Guiana. It was developed under European Space Agency cooperation with strong Swiss leadership, including work by the University of Bern.

How is CHEOPS different from Kepler or TESS?

Kepler and TESS were designed mainly to survey large numbers of stars and discover planets. CHEOPS focuses on selected bright systems, allowing more detailed measurements of known exoplanets.

What can CHEOPS reveal about an exoplanet?

By measuring a planet's transit depth, CHEOPS can determine its radius. Combining that radius with a mass measured by other observations helps scientists estimate density and infer whether the planet is rocky, icy, or gaseous.

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