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I've heard about a scenario where Jupiter once wreaked havoc on the orbits of the inner planets, pushing some of them closer to the Sun and pulling others furth
by kijin 10y ago
I've heard about a scenario where Jupiter once wreaked havoc on the orbits of the inner planets, pushing some of them closer to the Sun and pulling others further away. (It's not the Nice model [1] but some unorthodox variation of it.)
Could Mars have been closer to the Sun when this lake existed (3.5 billion years ago), or is that too late in the history of the Solar System for any major disturbance to have happened?
[1] https://en.wikipedia.org/wiki/Nice_model https://en.wikipedia.org/wiki/Nice_model
- dr_zoidberg 10y agoI think you're refering to the Grand tack hypothesis[0], but Wikipedia is scarce on details as to how that scenario could've affected Mars orbit. I was trying to see if this had a timeline, because the NASA cites lack of CO2 as far as -3.5GY, but there isn't enough detail in Wikipedia and my 5 minutes slack time is over :( [0] https://en.wikipedia.org/wiki/Grand_tack_hypothesis https://en.wikipedia.org/wiki/Grand_tack_hypothesis