A permanent, asymmetric dust cloud around the Moon

  title={A permanent, asymmetric dust cloud around the Moon},
  author={Mih{\'a}ly Hor{\'a}nyi and Jamey R. Szalay and Sascha Kempf and J Schmidt and Eberhard Gr{\"u}n and Ralf Srama and Zoltan Sternovsky},
Interplanetary dust particles hit the surfaces of airless bodies in the Solar System, generating charged and neutral gas clouds, as well as secondary ejecta dust particles. Gravitationally bound ejecta clouds that form dust exospheres were recognized by in situ dust instruments around the icy moons of Jupiter and Saturn, but have hitherto not been observed near bodies with refractory regolith surfaces. High-altitude Apollo 15 and 17 observations of a ‘horizon glow’ indicated a putative… 

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