Deaths on October 20

Harlow Shapley

Died on October 20, 1972

Harlow Shapley, American astronomer and academic (b. 1885)

Harlow Shapley (November 2, 1885 – October 20, 1972) was an American scientist, head of the Harvard College Observatory (1921–1952), and political activist during the latter New Deal and Fair Deal.Shapley used Cepheid variable stars to estimate the size of the Milky Way Galaxy and the Sun's position within it by using parallax. In 1953 he proposed his "liquid water belt" theory, now known as the concept of a habitable zone.

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Harlow Shapley

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Events on 1972

21 Feb

Sino-American relations
United States President Richard Nixon visits the People's Republic of China to normalize Sino-American relations.
8 May

Richard Nixon
Vietnam War: U.S. President Richard Nixon announces his order to place mines in major North Vietnamese ports in order to stem the flow of weapons and other goods to that nation.
22 May

Sri Lanka
Ceylon adopts a new constitution, becoming a Republic, changes its name to Sri Lanka, and joins the Commonwealth of Nations.
23 Jun

Central Intelligence Agency
Watergate scandal: U.S. President Richard M. Nixon and White House Chief of Staff H. R. Haldeman are taped talking about using the Central Intelligence Agency to obstruct the Federal Bureau of Investigation's investigation into the Watergate break-ins.
1 Sep

Bobby Fischer
In Reykjavík, Iceland, American Bobby Fischer beats Russian Boris Spassky to become the world chess champion.

Deaths on October 20

Harlow Shapley

Died on October 20, 1972

References

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Events on 1972

Sino-American relations

Richard Nixon

Sri Lanka

Central Intelligence Agency

Bobby Fischer