The Chernobyl power plant in Ukraine exploded, killing 31 people and spreading contamination across Western Europe.
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Astronomer Nicolaus Copernicus made his first observation of Saturn.
Rapper Ice Cube married Kimberly Woodruff.
William Shakespeare was baptized in Stratford-upon-Avon, Warwickshire, England.
Ariel 1, the first British-American satellite, was launched from Cape Canaveral in Florida, US.
The official secret police force of Nazi Germany, the Gestapo, was established.
