 The mixing of the fuel at Proxima Centauri's core through convection and its relatively low energy-production rate mean that it will be a main-sequence star for another four trillion years.In 2016, astronomers announced the discovery of Proxima Centauri b, a planet orbiting the star at a distance of roughly with an orbital period of approximately 11.2 Earth days.According to updated measurements by the ESPRESSO spectrograph, its estimated mass is at least 1.17 times that of the Earth.