The Hubble Space Telescope captured the first images of the surface of Pluto.
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The USSR's Voskhod 1 spacecraft became the first spaceflight with multiple crew members.
All nine planets (including Pluto) lined up with the sun.
Danish astronomer Tycho Brahe witnessed the supernova SN 1572.
Russia's Mir Space Station was deorbited over the South Pacific Ocean.
The USA's first space station, Skylab, was launched into Earth's orbit.
