Timeline for What would be the atmospheric pressure gradient in an open pit reaching to the centre of the moon?
Current License: CC BY-SA 4.0
16 events
| when toggle format | what | by | license | comment | |
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| Jan 8, 2019 at 1:42 | vote | accept | Robert K. Bell | ||
| Jan 7, 2019 at 20:36 | history | edited | Robert K. Bell | CC BY-SA 4.0 |
added 69 characters in body
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| Jan 4, 2019 at 20:36 | answer | added | Dan | timeline score: 2 | |
| Jan 3, 2019 at 9:36 | comment | added | Mołot | @RobertK.Bell See this sketch - Earth is twisting solar wind making it hit pretty much all regions, with different intensity and at changing angles. too complicated for me to calculate. That said, thermal escape would leave you with hardly anything but Xenon anyway. Can't find citations now, but I remember reading that it would be hundreds of years, no thousands, from Earth-like pressure to 0 on the moon. | |
| Jan 3, 2019 at 9:30 | review | Close votes | |||
| Jan 3, 2019 at 15:28 | |||||
| Jan 3, 2019 at 9:26 | comment | added | Robert K. Bell | @Mołot indeed. The contents of the pit would experience some solar wind depending on the latitude of the entrance. But, how wide a pit would be needed for the solar wind to empty the pit entirely within the expected lifetime of a civilization? (say at least 5k years). And, is that ~0 pressure at the top going to be a show-stopper, preventing the pit from building up at least 13 kpa at any depth? | |
| Jan 3, 2019 at 9:18 | comment | added | Mołot | @RobertK.Bell without protection from solar wind, pressure range will end up being around 0 all the way down rather fast. Also see this chart - even without solar wind, all you can get in a longer term on the Moon is Xenon. Moon is below carbon dioxide, oxygen, nitrogen and water range on the chart, meaning that under Moon temperatures particle would simply fly away. " I was going for a habitable-range" - sorry, but you will not get it. | |
| Jan 3, 2019 at 9:12 | comment | added | Robert K. Bell | @L.Dutch kinda? I was going for a habitable-range kind of deal (long-term temporal with an open end, plus "would this be habitable at any physical point" kind of deal) | |
| Jan 3, 2019 at 9:09 | comment | added | L.Dutch♦ | You might want to check this physics.stackexchange.com/q/110246 | |
| Jan 3, 2019 at 9:07 | history | notice removed | L.Dutch♦ | ||
| Jan 3, 2019 at 9:07 | comment | added | L.Dutch♦ | All in all, your question seems to be "assuming I can build a column of gas spanning from the surface to the center of celestial body, what is the pressure at the center?" which sounds more like an (interesting) question for physics, not for worldbuilding. | |
| Jan 3, 2019 at 9:07 | history | edited | Robert K. Bell |
use correct tag (hard-science would require impossible citations)
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| Jan 3, 2019 at 9:01 | history | edited | Robert K. Bell | CC BY-SA 4.0 |
remove incompatible tag, clarify intent of pit, fix typo
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| Jan 3, 2019 at 8:57 | history | notice added | L.Dutch♦ | Hard Science | |
| Jan 3, 2019 at 8:55 | review | First posts | |||
| Jan 3, 2019 at 12:22 | |||||
| Jan 3, 2019 at 8:52 | history | asked | Robert K. Bell | CC BY-SA 4.0 |
