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TY - JOUR AU - Grün, E. AU - Zook, H. A. AU - Baguhl, M. AU - Balogh, A. AU - Bame, S. J. AU - Fechtig, H. AU - Forsyth, R. AU - Manner, M. S. AU - Horanyi, M. AU - Kissel, J. AU - Lindblad, B.-A. AU - Linkert, D. AU - Linkert, G. AU - Mann, I. AU - McDonnell, J. A. M. AU - Morfill, G. E. AU - Phillips, J. L. AU - Polanskey, C. AU - Schwehm, G. AU - Siddique, N. AU - Staubach, P. AU - Svestka, J. AU - Taylor, A. PY - 1993 DA - 1993/04/01 TI - Discovery of Jovian dust streams and interstellar grains by the Ulysses spacecraft JO - Nature SP - 428 EP - 430 VL - 362 IS - 6419 AB - ON 8 February 1992, the Ulysses spacecraft flew by Jupiter at a distance of 5.4 AU from the Sun. During the encounter, the spacecraft was deflected into a new orbit, inclined at about 80° to the ecliptic plane, which will ultimately lead Ulysses over the polar regions of the Sun1. Within 1 AU from Jupiter, the onboard dust detector2 recorded periodic bursts of submicrometre dust particles, with durations ranging from several hours to two days, and occurring at approximately monthly intervals (28 ± 3 days). These particles arrived at Ulysses in collimated streams radiating from close to the line-of-sight direction to Jupiter, suggesting a jovian origin for the periodic bursts. Ulysses also detected a flux of micrometre-sized dust particles moving in high-velocity (⩾ =26 km s-1) retrograde orbits (opposite to the motion of the planets); we identify these grains as being of interstellar origin. SN - 1476-4687 UR - https://doi.org/10.1038/362428a0 DO - 10.1038/362428a0 ID - Grün1993 ER -