A new era of exoplanet characterisation – CHEOPS first results from a year in space

After millennia of speculation, the first discovery of an exoplanet came as a shock. It was not that many doubted that planets orbit stars other than the Sun, but the kind of planet was totally unexpected and different from anything known in the solar system. Since then, several thousands of exoplanets have been found and most of them quite different from the planets in the solar system; not because solar system-like planets are necessarily that rare, but it turns out that they are relatively difficult to discover. From the early phase of exoplanet discovery, the field has now turned to exoplanet characterisation – to better understand what kind of planets there are. The Swiss-lead ESA space telescope CHEOPS (Characterising ExOPlanet Satellite) is an ultra-high precision photometer designed to measure known exoplanets transiting in front of their stars, and in some cases, eclipsing behind them. In combination with other data, we get to know the nearby planets in more detail than ever before. In this talk I will give context and present results from CHEOPS first year in space, high-light Swedish contributions, and reflect on what we can expect from the years to come.