Number 234 (Story #1), July 21, 1995 by Phillip F. Schewe and Ben Stein NEW OSCILLATION MODES IN THE SUN have been discovered by studying Ulysses and Voyager measurements of solar wind particle fluxes. Looking at flux levels recorded over years, three scientists at AT&T Bell Labs have discerned periodicities in the data. They assert that some of the features correspond to pressure (or p-mode) oscillations---essentially standing acoustic waves at the sun's surface---previously known from direct visual observations. But other, unexpected, patterns in the data, with periods of days or hours, also suggest the existence of hypothesized gravity (or g-mode) oscillations, which may well arise from the solar core, where fusion reactions occur and solar neutrinos originate. If this interpretation is substantiated, then measurements of the solar wind might serve as a probe of the deep solar interior. The Bell Labs researchers have tried to explain how disturbances at the solar core could be transcribed into variations in the solar wind. They suggest that the g modes influence the solar wind by helping to shape the solar magnetic field. (David J. Thomson et al., Nature, 13 July 1995.)