High-velocity submicrometre-sized dust particles expelled from he jovian system have been identified by dust detectors on board everal spacecraft. On the basis of periodicities in the dust mpact rate, Jupiter's moon Io was found to be the dominant ource of the streams. The grains become positively charged within the plasma environment of Jupiter's magnetosphere, and gain energy from its co-rotational electric field. Outside the magnetosphere, the dynamics of the grains are governed by the interaction with the interplanetary magnetic field that eventually forms the streams. A similar process was suggested for Saturn. Here we report the discovery by the Cassini spacecraft of bursts of high-velocity dust par tides ( ≥ 100 km s~(-1)) within ～70 million kilometres of Saturn. Most of the particles detected at large distances appear to originate from the outskirts of Saturn's outermost main ring. All bursts of dust impacts detected within 150 Saturn radii are characterized by impact directions markedly different from those measured between the bursts, and they clearly coincide with the spacecraft's traversals through streams of compressed solar wind.
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机译：从木星系统中喷出的亚微米级高速尘埃颗粒已由太空飞船上的尘埃探测器识别出。根据尘埃撞击速率的周期性，发现木星的月球Io是溪流的主要威胁。颗粒在木星磁层的等离子体环境中带正电，并从其同向旋转电场中获取能量。在磁层之外，晶粒的动力学受与最终形成流的行星际磁场相互作用的支配。对于土星也提出了类似的过程。在这里，我们报道了卡西尼号航天器在土星〜7000万公里内发现了高速尘埃爆发（≥100 km s〜（-1））的发现。在远距离检测到的大多数粒子似乎起源于土星最外层主环的郊区。在150个土星半径内检测到的所有尘埃冲击爆发都具有明显不同于撞击之间所测得的撞击方向的特征，并且这些撞击方向显然与航天器通过压缩太阳风流的穿越方向一致。
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