Doppler spectroscopy, 1974

Numéro d’image : 12347620
Doppler spectroscopy, 1974
Doppler spectroscopy, 1974. Researcher working with the Radial Velocity Measuring machine at the European Southern Observatory site at La Silla in Chile, in June 1974. This method, also known as doppler spectroscopy, examines velocity-induced variations in the spectrum of a star, allowing the radial velocity of stars to be calculated. This method can be used to determine the properties of some binary stars, known as spectroscopic binaries. More sensitive versions of such equipment have since been used to detect planets orbiting distant stars. The first exoplanet detected using this method was discovered in 1995. As of 2016, around 582 extrasolar planets have been discovered using this method.
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