Equally puzzling are observations of the same boundary region with an instrument on the Cassini spacecraft, which recorded the density of atoms at higher energies, above 6,000 electron volts.

同样让人困惑的是卡西尼(Cassini)空间探测器探测相同区域的结果。它记录到的原子带的能量要高一些，超过了6000电子伏。