A giant rock floating through space (technical term)

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Who says science can’t be fun sometimes?

Asteroid 2005 YU55, a giant rock floating through space, looks like a giant rock floating through space, reports one astronomer, who observed the giant rock as it floated through space past the Earth on Tuesday.

http://www.csmonitor.com/Science/2011/1109/Asteroid-2005-YU55-looks-like-a-giant-rock-floating-through-space-reports-astronomer