Asteroid Bennu sports landslide

The impact of a tiny body on the asteroid Bennu caused a rock slide that revealed the surface properties of rock-pile asteroids.

Using images collected by NASA's OSIRIS-REx spacecraft, researchers have traced the progress of a landslide on the asteroid Bennu

The team determined that the way this "deep-space landslide" progressed would be possible only if Bennu had certain properties at its surface 

  namely, dry dust particles with little or no cohesion.

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. The discovery gives scientists better insight into how rubble-pile asteroids — those composed of a loose collection of smaller rocks and dust and  held together by gravity 

"The landslide started when debris from a meteoroid impact fell back onto Bennu's surface

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