published in space

Radial velocity method

In a binary system consisting of one star and one planet, the spectrographic analysis of the light from the star enables us to measure the variation in its radial velocity, by means of the so-called Doppler effect, and finally to estimate the planet’s mass and its orbital period. Credits: ESO

With the sponsorship of the Italian Ministry of Education, Universities and Research
Eni S.p.A. - P.IVA 00905811006