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urmomaisjabbathehutt t1_ixciji8 wrote

You may end with same results but it's not about definition, its the actual event

did an impact (or impacts) flipped the planet 180 degrees or did it made it rotate the opposite direction? We can argue that Uranus ended sidewise 90 degrees so flipping is a compelling possibility but we don't have yet enough data to show a definitive answer

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EarthSolar t1_ixd7c9q wrote

I’m responding to the other person.

A lot of things in planetary science can be handwaved away with impacts, that doesn’t mean it’s the correct answer for everything. Tidal-locking, atmospheric tides, rotation instability at very low rotation rates, are also present.

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