Exoplanets orbiting TRAPPIST-1 hints towards possibility of water, says study Exoplanets orbiting TRAPPIST-1 hints towards possibility of water, says study A New Study Indicates Towards The Possible Signs Of Water On Outer Earth-sized Planets Orbiting The Nearby Ultracool Dwarf Star TRAPPIST-1. News Nation Bureau | Edited By : Himani Garg | Updated on: 02 Sep 2017, 09:02:09 AM New Delhi: A new study indicates towards the possible signs of water on outer Earth-sized planets orbiting the nearby ultracool dwarf star TRAPPIST-1, the system with most exoplanets in a star's habitable zone adding up to further possibilities in the quest of search for life. The study was published in The Astronomical Journal based on the observations spotted by the Hubble Space Telescope — a project of international cooperation between European Space Agency (ESA) and NASA.