ASTRONOMERS, physicists and even philosophers the world over are engaged these days in nothing less than a reappraisal of the origin and nature of the universe, largely because of the work of the man who appears on this week's cover. Dutch-born Professor Maarten Schmidt of California Institute of Technology is the astronomer who found the key to quasars (quasi-stellar radio sources), those bright, distant and mysterious objects that have been baffling astronomers. Now Schmidt and other scientists are using quasars to unlock some of nature's most difficult enigmas. Perhaps not since Galileo has an astronomer so jolted the specialists whose field...
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