An international team of astronomers has detected a candidate super-Earth planet orbiting Proxima Centauri, the nearest star to the Sun. An artist’s impression of the Proxima Centauri system. Image credit: Lorenzo Santinelli. Proxima Centauri is a red dwarf star only 4.23 light-years away in the constellation Centaurus. This small, cool star is not visible to the naked eye and lies near to the much brighter pair, Alpha Centauri AB. In 2016, a rocky...