Anomalous grooves on Martian moon Phobos explained by impacts

Wednesday, August 31, 2016 - 05:01 in Astronomy & Space

Some of the mysterious grooves on the surface of Mars' moon Phobos are the result of debris ejected by impacts eventually falling back onto the surface to form linear chains of craters, according to a new study. One set of grooves on Phobos are thought to be stress fractures resulting from the tidal pull of Mars. The new study addresses another set of grooves that do not fit that explanation.

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