Michel Gustave Édouard Mayor is a Swiss astrophysicist and professor emeritus at the University of Geneva's Department of Astronomy. He formally retired in 2007, but remains active as a researcher at

51 Pegasi b, officially named Dimidium, is an extrasolar planet approximately 50 light-years away in the Pegasus constellation. Dimidium was the first exoplanet to be discovered orbiting a main-sequen