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Origin of Phobos and Deimos, Where did these guys come from?
post Jul 7 2016, 03:17 AM
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I remember as a youngster in the 1950s, being taught that the Pacific basin was probably the remnant of an impact that provided the material from which Luna was formed. Continental drift was discussed but only as a hypothetical in the context of the east coast of South America and the west Coast of Africa with the jigsaw fit pretty much dismissed as a coincidence. Mars today is in the same space. Lots of conflicting models and hypotheses that cannot be adequately tested and limited empirical data until such time as humans rather than robots get to ground proof Mars, if ever.
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post Jul 7 2016, 03:22 AM
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Or we get a nice sample return from Phobos and Deimos. Would they settle the matter once and for all in an Earth-based lab, anymore than samples from the Moon constrained theories of its origin?
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