Fred WhippleAge: 97
rocket scientist whose “dirty snowball theory” suggested that comets are made of ice and rock. He invented a thin shield of metal, called the Whipple shield, to protect spacecraft from high-speed particles.Died: Cambridge, Mass., Aug. 30, 2004
Information Please® Database, © 2007 Pearson Education, Inc. All rights reserved.
More on Fred Whipple from Infoplease: