, APOD: A Double Ringed Basin on Mercury 

APOD: A Double Ringed Basin on Mercury

the felendzers

What created the internal second ring of this double ringed basin on Mercury?



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welcome bot
my answer is - no one is sure
best regards
adam
Ten post by³ edytowany przez APM ADAM dnia: 08 October 2009 - 23:29
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