1519 ~ Cortez arrived in Mexico.

1733 ~ Birthday of Joseph Priestly, Clergyman & Scientist, Isolated Oxygen.

1764 ~ Birthday of Charles Earl Grey, British PM (Whig, 1830-34).

1781 ~ Sir William Herschel discovered Uranus.

1855 ~ Birthday of Percival Lowell, Astronomer (predicted discovery of Pluto).

1868 ~ U.S. Senate began Pres. Andrew Johnson Impeachment trial. He was acquitted.

1897 ~ Birthday of William Herald, Swimmer (Olympic Gold -1920).

1930 ~ Clyde Tombaugh announced discovery of Pluto at Lowell Observatory.

1970 ~ Digital Equipment Corp (DEC) introduced PDP-11 Minicomputer.

1989 ~ Power grid of Qubec knocked off-line by solar flare.

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Eudaimonia