Astronomers have discovered that two exoplanets orbiting a red dwarf star that are unique in their composition. These two exoplanets are unlike any other discovered outside the Solar System. These two planets are filled with water.
These water worlds located in a planetary system 218 light-years away in the constellation Lyra are unique since the liquid makes up a large volume of of their composition. Astronomers observed exoplanets Kepler-138c and Kepler-138d with Hubble and the retired Spitzer space telescopes to make the watery discovery.The team, led by PhD student Caroline Piaulet of the Trottier Institute for Research on Exoplanets (iREx) at the Université de Montréal, published a detailed study of a planetary system known as Kepler-138 in the journal Nature Astronomy.
