The International Astronomical Union named Pluto’s fourth and fifth moons Kerberos and Styx.
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Jupiter's moon was found to have a liquid ocean under a thick crust of ice.
Project Starshot was announced by Yuri Milner, Stephen Hawking, and Mark Zuckerberg.
A Neptune-sized exomoon became the first one discovered outside the Solar System.
Kepler's Supernova was discovered.
Two new moons orbiting Uranus were announced in Nature magazine.
