The International Astronomical Union named Pluto’s fourth and fifth moons Kerberos and Styx.
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Astronomer Nicolaus Copernicus made his first observation of Saturn.
NASA's Spitzer Space Telescope discovered a star with seven Earth-sized planets orbiting it.
The USA's first space station, Skylab, was launched into Earth's orbit.
NASA revealed that water vapor was discovered in the atmosphere of an Earth-size planet, the exoplanet K2-18b.
Project Starshot was announced by Yuri Milner, Stephen Hawking, and Mark Zuckerberg.
