The International Astronomical Union named Pluto’s fourth and fifth moons Kerberos and Styx.
Source
Jupiter's moon was found to have a liquid ocean under a thick crust of ice.
The Hubble Space Telescope captured the first images of the surface of Pluto.
The US spacecraft Pioneer 10 launched.
The New York Times published Edwin Hubble's discovery that the Andromeda 'nebula' is actually a galaxy.
Astronauts on Apollo 15 discovered a rock that could date back to the birth of the moon.
