>All the planets of the solar system formed at roughly the same time 4.5 billion years ago>Venus, which is slightly less massive than Earth, has an atmosphere that is 90 times denser than Earth'sReconcile the two statements above.
The difference of atmospheric pressure is easy to explain when you include all the "outer layer" of the planet that exchanges (losses) matter with the vacuum. In the case of the Earth, most CO2/H2O/SO2 of the outer layer are fixated as solid or liquids in the crust. For that comparison between planets you can't ignore the crust. Venus itself has out-gassed most of its atmosphere (it lost essentially all its hydrogen), but its crust (if that term applies to Venus surface) is too hot to retain some molecules as solids/liquids, different phenomena that aren't mutually exclusive as you see in Venus.
>>16828354nature is wild
>>16828342Are you implying that planetary structure and composition should depend only on age and mass? That's a ridiculous hypothesis.
>>16828342they didnt all form at the same time though
>>16828373not OP, but all stars are made out of hydrogen, so why shouldn't all planets be made of the same chemical as well? why are all stars identical in chemical composition but planets have so much variation? Both Venus and Earth were created out of the same primordial cloud that gave rise to the Solar System, so their compositions should be similar
>>16829023During the early life of the Solar System, but smaller bodies will loss more of its volatile elements during the initial formation and later with the Sun out-gassing all the inner Solar System for billion of years. IIRC most terrestrial hydrogen actually accumulated after the initial formation, in part because the pre-Earth lost most of its volatile elements after a large collision with a planetoid (pre-Moon).
What's the best modpack for KSP? I don't want to spend ages installing mods one by one but I want an improved experience that's not too autistic.
>>16828342Small differences in initial conditions can lead to big differences down the line, it's not all that surprisingThe most fascinating thing about Venus to me is that they think it had a cataclysmic resurfacing event only ~500 million years ago, that completely erased the old surface. Purportedly because Venus has no plate tectonics, so pressure was just building under the crust until one day BAM.It probably wasn't a habitable planet before this event, but it could have been. The timeline also coincides with when complex life started appearing on Earth, so I think some of those stories about Martians leaving their dying world for Earth should be about leaving Venus instead. You could make it all biblical too, paradise world -> banishment and it becomes literal hell -> end up on shitty cold containment world
>>16830029When you read the woman of the Apocalypse narrative from the Bible you will realize that a lot of the things that are ascribed to this woman belong to Venusian female entities (Aphrodite, Urania, the planet itself, etc). It likely does come to show that all the stuff about the apocalypse is already related to ancient cataclysms and Venus is part of it.Then when you read about stuff like Venus getting called the red illumination, appearing after everyone else had already settled, being tied to the floods being tied to entities that get castrated and destroyed. Yeah all the shit already happened. The Bible et al might just be a guidebook on how to recreate these events for whatever purposes societies need to accomplish.
>>16830029Perhaps a twist on panspermia, where Venus had at least simple life and enough of it to seed Earth was blown our way when the cataclysmic event happened.
