K2-18b (IMAGE) American Physical Society Caption An artistic impression of one of the exoplanets in the study, K2-18b. The image shows the planet, its host star, and an accompanying planet in this system. K2-18b is now the only gas dwarf exoplanet known to host both water and temperatures that could support life. Credit ESA / Hubble, M. Kornmesser, CC BY 4.0 Usage Restrictions Credit as noted. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.