Osiris became the first discovered exoplanet with an atmosphere.
It was found to have a hydrogen-rich atmosphere.
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The first spacewalk was made by the Soviet cosmonaut Georgy Grechko during Salyut 6 EO-1 mission.
NASA's Mariner 6 space probe successfully launched from Cape Canaveral, Florida.
The last total solar eclipse of the 20th century occurred and was visible from Europe and Asia.
Dutch astronomer Johannes Fabricius discovered sunspots.
A chimpanzee named Ham became the first primate to go to space aboard the US MR-2 spacecraft.
