1927 – Born on the 6th of February Brooklyn, New York.
1950 – He graduated from Swarthmore College in United States.
1954 – He received a doctorate in physics from Cornell University.
– He joined the faculty of Princeton University.
1969 – He researched and proposed the idea of the O’Neill Cylinder.
1988 – He founded O’Neill Communications in Princeton.
1992 – He died on the 27th of April due to Leukemia.