The astronomer Percival Lowell died at the age of 61. Here is all you want to know, and more!
Biography - A Short Wiki
Distinguished astronomer who studied the canals of Mars and published three books – Mars, Mars and Its Canals, and Mars As the Abode of Life – about his discoveries. He was also a key figure in the discovery of Pluto.
He had a brother named Lawrence and a sister named Amy.