The first crew arrived at the International Space Station onboard a Soyuz spacecraft.
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Halley's Comet was last seen from Earth. It only orbits the Earth once every 75 to 76 years.
A conjunction of Sun, Mercury, Venus, Mars, Jupiter, Saturn, and the Moon occurred.
The US spacecraft Pioneer 10 launched.
Europe's Planck spacecraft found evidence that our universe is 13.8 billion years old.
Russia's Mir Space Station was deorbited over the South Pacific Ocean.
