Astronomers using NASA's Hubble and Spitzer telescopes have made a discovery which has brought them a micro-step closer to confirming that planets beyond our own might harbour Earth-like oceans.
A team of University of Montreal researchers discovered two exoplanets, Kepler-138 c and Kepler-138 d, that they believe are largely made up of water.
While water hasn't been directly detected on either exoplanet, by comparing their sizes and masses to models, astronomers concluded that a significant fraction of their volumes – up to half – should be made of materials lighter than rock but heavier than hydrogen or helium.
