The Chernobyl power plant in Ukraine exploded, killing 31 people and spreading contamination across Western Europe.
Source
Astronomer Nicolaus Copernicus made his first observation of Saturn.
Rapper Ice Cube married Kimberly Woodruff.
The Treaty of London was signed by Italy, Britain, France, and Russia.
A meteorite shower caused thousands of meteor fragments to fall in L'Aigle, France.
Ariel 1, the first British-American satellite, was launched from Cape Canaveral in Florida, US.
