K2-155d
It would take 2 million years to reach planet K2-18b, scientist says
It will take two million years to reach K2-18b, a rocky planet orbiting in the habitable zone of red dwarf K2-18, according to Angelos Tsiaras of the University College London's Center for Space Exochemistry Data (CSED) and the leader of one of the research teams that last week detected water vapor in its atmosphere.