1972 | Discovery of extensive magnetism of lunar surface |
1975 | Discovery of conducting lunar core (with B. Goldstein) |
1977 | Discovery of absorption of solar wind by Venus atmosphere |
1978 | Established that Mars had no significant magnetic dipole moment |
1979 | Discovery of lightning on Venus (with F. L. Scarf) |
1980 | Established that Venus had no significant magnetic dipole moment |
1981 | Discovered the induced magnetotail of Venus |
1984 | Discovered disturbances in interplanetary magnetic field correlated with passage of asteroid 2201 Olijato |
1985 | Discovery of flux transfer events at the magnetopause of Mercury and Jupiter (with R. J. Walker) |
1988 | Discovery of mirror mode fluctuations in the coma of comet Halley |
1989 | Discovery of ULF waves in the magnetosphere of Mercury |
1995 | Confirmed that Mars had no significant magnetic dipole moment |
1998 | Discovery of substorm-like behavior in the magnetosphere of Jupiter |
2000 | Discovery of the variable composition of Io's atmosphere |
2000 | Determined the processes enabling the plasma circulation of the jovian magnetosphere |
2001 | Used in situ magnetometry to determine the rotation period of Jupiter |
2001 | Explained the formation of the torus in terms of ENA production in the Io exosphere |