Barnard's Star b (also designated GJ 699 b) was a proposed super-Earth-mass exoplanet orbiting Barnard's Star in the constellation of Ophiuchus, six light-years away from Earth. The exoplanet's discovery by an international team of astronomers – including the European Southern Observatory and Carnegie Institution for Science – was officially announced on 14 November 2018. More recent studies, in 2021 and 2022, have concluded that the radial velocity signal corresponding to Barnard's Star b is most likely an artifact of stellar activity, and thus the planet does not exist.
