Accueil
Plan
Glossaire
Contact
Liens
Observatoire de Paris
Les ExoplanètesCoRoTCoursOutilsBase de données
<-   The first exoplanet   ->
figures/graphe3.gif
Radial velocity variations of the star 51 Peg, showing a periodic movement attributed to a planet located at 0.05 AU, with a period of 4.7 days and a mass comparable to half of Jupiter's mass.
Crédit : CNES

In the nineties, a systematic follow-up of the radial velocity variations of bright stars similar to the Sun that was aimed at discovering double stars revealed the existence of exoplanets, or objects with very low masses in orbit around a star.

51 Pegasi

The first exoplanet was discovered in 1995 around the star 51 Pegasi, through observations made in the Haute-Provence Observatory by a French-Swiss team supervised by Michel Mayor.

CoRoT, with its long observation times and its very high photometric accuracy, can detect exoplanets. Therefore, it was decided to include this new objective in the program, despite the increased complexity and difficulty that this new objective would entail.