"Gehrels, Tom"@en . "1925Z"^^ . . "Anton M.J. \"Tom\" Gehrels (February 21, 1925 \u2013 July 11, 2011) was a Dutch-American astronomer, Professor of Planetary Sciences, and Astronomer at the University of Arizona, Tucson."@en . . "1925-02-21Z"^^ . . . . "2011-07-11Z"^^ . "2011Z"^^ . "Tom Gehrels"@en . "astronomer" . . .