Timeline for Landscape of Indefinitely Old Earth
Current License: CC BY-SA 4.0
15 events
| when toggle format | what | by | license | comment | |
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| Nov 14, 2023 at 6:21 | history | edited | Meatball Princess | CC BY-SA 4.0 |
added 1021 characters in body
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| Nov 13, 2023 at 20:08 | comment | added | AlexP | @StarfishPrime: That is about planets which would otherwise be tidally locked to their primary, not about normal planets rotating very much faster than their orbital periods. What the question misrepresents is that as long as Earth has a Moon, the tidal force of the Moon will slow down the rotation of the Earth and the Moon will recede because of Newton's inconvenient law of conservation of angular momentum. | |
| Nov 13, 2023 at 19:31 | comment | added | Starfish Prime | @AlexP there is some suggestion that the presence of an atmosphere can affect rotation, even if the atmosphere isn't Venusian in thickness: Asynchronous rotation of Earth-mass planets in the habitable zone of lower-mass stars (non-arxiv link, if you care about such things). | |
| Nov 13, 2023 at 19:25 | answer | added | Starfish Prime | timeline score: 5 | |
| Nov 13, 2023 at 18:25 | answer | added | Singularity24601 | timeline score: 0 | |
| Nov 13, 2023 at 16:34 | comment | added | Richard Kirk | I think the question needs some work. What would the Earth be like if we did some things to keep everything the same, but omitted some others, but we do not have the list. What is the logic here? We could allow the moon to wander away. We could add a reflector at the first Lagrange point to keep the solar radiation constant. People have even hypothesised some device that injects the surface hydrogen and helium deep into the sun to delay it becoming a red giant. If we keep everything the same, everything is the same. But it seems that's not the answer you want. | |
| Nov 13, 2023 at 14:29 | comment | added | Vesper | Not enough data. Even Mars does not server as a good example of what happens to a rocky planet after its tectonic ceases. I expect that the crust would get thicker thus preventing any continental drift, both laterally and up/down, so nothing would sink. Erosion could be a different thing, with still enough liquid water and air around the surface would deteriorate, yet at an unknown pace, especially when it'll hit some biospheres, say a large forest remaining for a million years would have its ground level higher than before. | |
| Nov 13, 2023 at 13:55 | comment | added | AlexP | What does the atmosphere have to do with slowing the rotation of the Earth? The atmosphere is little more than a flimsy and lightweight ground mist. | |
| Nov 13, 2023 at 12:59 | comment | added | Meatball Princess | @AlexP I'm talking about atmospheric tides due to heating. see the "boring billion" year study of 19 hour days. | |
| Nov 13, 2023 at 9:59 | comment | added | AlexP | *"Match the solar tides precisely with lunar tides:" This makes no sense. The tidal force due to the Moon is about twice as strong as the tidal force due to the Sun. And anyway the only way to stop tidal forces from slowing down Earth's rotation is to get rid of the Moon completely and have Eart tidally locked to the Sun. | |
| Nov 13, 2023 at 8:48 | comment | added | Meatball Princess | @MikeScott let's just say we have massive super conducting wires running a long the equator buried deep under surface. | |
| Nov 13, 2023 at 8:47 | comment | added | Mike Scott | But whatever you do to keep the magnetic field going may well keep plate tectonics going as well. So “The tectonic activities will eventually cease” may be incorrect. | |
| Nov 13, 2023 at 8:41 | comment | added | Meatball Princess | @MikeScott yes forgot to mention that. | |
| Nov 13, 2023 at 8:41 | comment | added | Mike Scott | You’ll need to magically stabilise the Earth’s magnetic field as well. Otherwise it will probably fail in 2-3 billion years and the solar wind will start to strip volatiles out of the atmosphere. | |
| Nov 13, 2023 at 8:32 | history | asked | Meatball Princess | CC BY-SA 4.0 |