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Barnacle Bill (Martian rock)
Barnacle Bill is a rock on Mars in Ares Vallis. It was the first rock on Mars analyzed by the ''Sojourner'' rover using its ''Alpha Proton X-ray Spectrometer''. The encounter occurred during Sol 3 of the Mars Pathfinder mission on the surface of Mars and took ten hours to complete.
Early analysis of data sent from ''Sojourner'' led scientists to speculate that the rock was andesite.
The name was inspired in mission scientists by barnacle-like structures on the rock that appeared in transmitted photos.
==See also==
*List of rocks on Mars
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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