The first exoplanet was discoverd in 1995 at the Haute-Provence Observatory.
From 1995 to 2004, we found more than 120 planets around more than 100 planetary systems.
These systems are really surprising :
In the nineties, a systematic follow-up of the radial velocity variations of bright stars similar to the Sun, aimed at discovering double stars, revealed the existence of exoplanets, objects with very low mass in orbit around a star.
It is the star 51 Pegasi which showed the first exoplanet in 1995, thanks to observations made at the Haute-Provence Observatory, by a French-Swiss team supervised by Michel Mayor.