Mars dust is sweeping the inner solar system, leaving a faint glow in night sky: Study

Dust grains were smashing into Juno's solar panels at velocities of 16,000 kmph, turning them into giant dust detectors.

from http://www.firstpost.com/tech/science/mars-dust-is-sweeping-the-inner-solar-system-leaving-a-faint-glow-in-night-sky-study-9407721.html