Speed is the rate at which something moves, while velocity is the speed in a particular direction.
The first report of radio waves from outside the solar system was made in 1931, by Karl Jansky at Bell Labs, New Jersey. 3 G.P. Thomson, Nobel Prize winner for physics, born 1892. S. Weinberg, Nobel Prize winner for physics, born 1933. 4 Speed is the rate at which something moves, while velocity is the speed in a particular direction. 5 Alan B. Shepard made the first U.S. manned space flight as part of NASAs Mercury mission in 1961.