Spurred by the Galileo probe's finding that Jupiter's winds do not decay with depth, Keke Zhang and Gerald Schubert of UCLA have modeled how convective motions deep within Jupiter penetrate upward through stable zones, to be manifest as the zonal wind pattern in the giant planet's belts and zones. Paolo Farinella and Donald Davis simulated on a computer how E-K objects collide with one another. Although we expect E-K comets to be compositionally primitive, they must have experienced many fragmenting collisions, and thus may no longer physically resemble early planetary building blocks. I'm skeptical that the simulations are fully realistic. A final planetary paper in the August 16th Science is by Richard Binzel, editor of The Planetary Society's The NEO News , who reports discoveries about the relationship of some Earth-approaching asteroids to meteorites.
Science is disappointing.
But the Web site provides a fine index to Science , beginning with October 1995 issues. Clark R. Chapman is an institute scientist at the Boulder office of the Southwest Research Institute. All rights reserved.