Exoplanet data graph | Tokyo Institute of Technology

15 New Exoplanets Discovered — and One of Them May Be Suitable for Liquid Water

The planets orbit a red dwarf star called K2-155, located 200 light-years from Earth.

The results of the Tokyo Institute of Technology's 3D global climate simulations for exoplanet K2-155d are plotted here. Surface temperatures are shown as a function of insolation flux, which is the amount of incoming stellar radiation, and it's estimated at 1.67 ± 0.38. When the insolation exceeds 1.5, a so-called runaway greenhouse effect occurs, so this point signals a cut-off point for life-friendly temperatures. If the insolation is under 1.5, the surface temperature is more likely to be moderate. | The Astronomical Journal
An artist's illustration of NASA's Transiting Exoplanet Survey Satellite (TESS), which will hunt for exoplanets orbiting the brightest stars just outside our solar system. It is scheduled to launch in April 2018. | NASA Goddard Space Flight Center