Italian astronomer Giovanni Donati became the first person to observe the spectrum of a comet.
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Astronomer Edwin Hubble formally announced the existence of other galactic systems at a meeting of the American Astronomical Society.
The first US woman in space, Sally Ride, died from pancreatic cancer at the age of 61.
The International Astronomical Union named Pluto's fourth and fifth moons Kerberos and Styx.
German Astronomer Karl Ludwig Harding discovered the 3 Juno asteroid in the Asteroid Belt.
A galaxy named 'Dwingeloo 1' was discovered to be just 10 million light-years from our own.
