Hubble and Spitzer Space Telescope data on a pair of exoplanets, Kepler-138 c and Kepler-138 d suggests that they may be water worlds. The planets orbit a star about 218 light-years away. [Full Story](https://www.space.com/exoplanets-potential-water-worlds-discovered)<br /><br />Credit: NASA's Goddard Space Flight Center <br />Paul Morris: Lead Producer <br />Cassandra Morris: Narrator<br /><br />Image Credit:<br />Water World next to Earth<br />Benoit Gougeon, Université de Montréal<br /><br />Music & Sound<br />“Space Museum” by Harry Gregson Williams [BMI] and Ho Ling Tang [BMI] via Atmosphere Music Ltd. [PRS] and Universal Production Music
