The radial velocity method for finding exoplanets

This animation shows how astronomers use very precise spectrographs such as the HARPS instrument on the 3.6-metre telescope at La Silla, Chile to find exoplanets. As the planet orbits its gravitational pull causes the parent star to move back and forth. This tiny radial motion shifts the observed spectrum of the star by a correspondingly small amount because of the Doppler shift. With super-sensitive spectrographs such as HARPS the shifts can be measured and used to infer details of a planet’s mass and orbit.

Crédit:

ESO/L. Calçada

À propos de la vidéo

Identification:eso1035g
Date de publication:24 août 2010 10:00
Communiqués de presse en rapport:eso1035
Durée:20 s
Frame rate:30 fps

À propos de l'objet

Type:Milky Way : Star : Circumstellar Material : Planetary System
Catégorie:Exoplanets
Stars

HD


Grand

Grands QT
2,9 Mio

Moyen

Podcast vidéo
1,9 Mio

Petit


For Broadcasters


Voir aussi notre