SOLAR PHYSICS:
SOHO Traces the Sun's Hot Currents
David Ehrenstein
Last week researchers announced that data from the Solar and Heliospheric Observatory (SOHO) spacecraft, which watches the sun continuously from a vantage point 1.5 million kilometers sunward of Earth, have revealed rivers of solar material flowing beneath the surface of the sun near its north and south poles. The rivers look somewhat like the jet streams--narrow, high-speed air flows that encircle Earth high in the atmosphere.