Proxima Centauri is the closest star to the solar system, and it may be home to a frigid planet six times the size of Earth in addition to the possibly habitable Proxima b
Source:
https://www.newscientist.com/article/2199748-our-nearest-neighbour-proxima-centauri-may-host-a-second-exoplanet/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home