Venus’ extraordinarily slow retrograde rotation was likely caused by a chance encounter with a moon-sized impactor. One that some 4.5 billion years ago likely slammed into our sister planet at a high angle and high velocity. Venus’ bizarre and extraordinarily slow retrograde rotation on its axis has long puzzled planetary scientists. But in a new paper presented at the recent European Geosciences Union General Assembly in Vienna, the authors argue that their models indic... [4272 chars]
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