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Feb 28, 2018 at 22:12 comment added Tim B II The obvious scientific answer is that we don't know for sure, but what we can do is look at Mars which has two much smaller moons meaning that the stability that we get from our Moon isn't reflected anywhere near as much on Mars. This link should give you some idea of what science is currently saying on that topic.
Feb 28, 2018 at 8:19 comment added Piomicron @TimBII Roughly how long would it be before this happened? Would it happen before 1600 years?
Feb 28, 2018 at 4:31 comment added Tim B II This is true and it's not like the Earth would instantly spin onto its back or some other rapid shift. If that was the case, then it would have a massively detrimental impact to life on Earth, especially us delicate humans.
Feb 28, 2018 at 4:12 comment added AlexP However, it is to be noted that in this context "unstable" means "unstable over geological time spans", that is, unstable in the same sense that mountain ranges are ephemeral structures.
Feb 27, 2018 at 23:16 history answered Tim B II CC BY-SA 3.0