A RICH ERA IN THE STUDY OF PLANETS DRAWS TO A CLOSE
PASADENA, Calif. LONG before telescopes or spacecraft, the ancients observed lights in the sky that wandered. They called them wandering stars, the planets. Mercury, Venus, Mars, Jupiter and Saturn, the visible wandering stars were sources of wonder and speculation, and people reached out to them in their imagination, investing them with life and extraordinary civilizations. Anything seemed possible, for nothing was known. In time astronomers with telescopes sighted other planets, Uranus, Neptune and Pluto, and moons around all of the planets save Mercury and Venus. Then in 1962, five years into the space age, humans began reaching out to the planets with incredible machines that resolved the distant lights into worlds of hard rock, ice, stormy gases, whistling plasmas, methane oceans, sulfurous volcanoes and other strange and unexpected vistas. Anything, it seemed, was possible -except the legendary Martians - as the worlds around the sun emerged from the unknown. Over the last two decades the little spacecraft, American and Soviet, embarked for all the planets except Pluto. A year hardly passed without a close encounter by at least one of the craft with one of the sun's family. They reconnoitered all the planets known to the ancients, orbited and probed the surface of Venus and landed on the red plains of Mars in search of life.