An article published in the journal “Astronomy & Astrophysics” describes a research on the star K2-18’s system. A team of researchers used the HARPS instrument at ESO’s La Silla observatory in Chile to study the exoplanet K2-18b, discovered in 2015, which could be a larger version of the Earth. The analysis of the data led to the discovery of a second exoplanet, which was called K2-18c, a little less massive and closer to its star therefore probably too hot to be in ​​its system’s habitable zone.