The first laboratory generation of an astrophysical shock wave has been reported by scientists. To produce the wave, scientists used a laser to create a high-energy plasma -- a form of matter composed of atoms and charged atomic particles -- that expanded into a pre-existing magnetized plasma. The interaction created, within a few billionths of a second, a magnetized shock wave that expanded at a rate of more than 1 million miles per hour, congruent with shocks beyond the solar system.