Science: News Under the Sun

The Book of Ecclesiastes says there is nothing new under the sun. Scientists exploring the solar system disagree —and with good reason. Each week their telescopes, radar screens, sampling devices and satellites uncover new information about the sun and its planets. Among their latest findings:

JUPITER'S TAIL. Because their cores are molten metal, both Jupiter and the earth possess mighty magnetic fields. Both planets also carry magnetic tails —or bulges in their magnetic fields —caused by exposure to the million-mile-per-hour solar wind, a flow of highly charged particles from the sun. Satellites of the Pioneer series determined in 1966 that the earth's...

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