Astronomer William Herschel first observed Uranus.
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The first all-female spacewalk took place.
Two newly discovered moons orbiting Pluto were named Nix and Hydra.
Russia's Mir Space Station was deorbited over the South Pacific Ocean.
Dutch astronomer Johannes Fabricius discovered sunspots.
Two new moons of Saturn were found in photos from the Hubble Space Telescope by Astronomers Amanda S. Bosh and Andrew S. Rivkin.
