'Sub-Earth' exoplanet discovered around the closest solo star to us 

 Astronomers have discovered a low-mass "sub-Earth" planet orbiting the closest solo star to the solar system, Barnard's star, that has a year lasting just three Earth days.  

https://cdn.mos.cms.futurecdn.net/e8RQ8arp8gtSnhuvpNrTwN.png

https://www.space.com/barnards-star-exoplanet-sub-earth