The Kepler space telescope has made possible the observation of two exoplanets orbiting the remains of a red giant. The planets are very close to their sun and typically the same size as the Earth.

Measuring the concentration of greenhouse gases in the atmosphere is not easy. For the first time, a harmonisation procedure has been adopted, revealing some surprises.

Observation by the Belgian telescope TRAPPIST of the occultation of a star by Eris, a dwarf planet which caused Pluto to lose its status as a planet, has caused some surprises.

Although considered as Earth’s twin, Venus shows itself to be a hostile environment where a strange luminous phenomenon known as “airglow” is produced.

Avoided by stellar seismologists until recently, red giants have proved themselves to be a goldmine for our understanding of the evolution of stars, but also for the Milky Way. What’s behind this revolution? The CoRoT and Kepler space missions that were crowned by a succession of articles in the Nature and Science journal.