Timeline for Will my worlds not be salty enough to support animal life?
Current License: CC BY-SA 3.0
7 events
| when toggle format | what | by | license | comment | |
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| Dec 20, 2015 at 23:41 | comment | added | nigel222 | One other thing is that all elements above Helium are "cooked" by a supernova explosion of a first generation star. So natural abundances of elements in a random solar system will be fairly similar everywhere to the extent that supernovae are similar. Planetary formation and geology will redistribute elements with respect to the averages. | |
| Dec 20, 2015 at 23:30 | comment | added | nigel222 | We don't know enough about other solar systems to say whether the geology of Earth is usual or unusual. Earth and the moon formed out of a low speed collision between two smaller planets in almost the same orbit. That probably is unusual. So elsewhere a rocky planet might be less well stirred with a shortage of heavier elements in its crust (esp. Life critical Mo. and I.) Speculation at present, not science. | |
| Dec 20, 2015 at 21:54 | comment | added | Dronz | Ok but Earth is Earthlike partly because it is what it is and several billion years of evolution took place here, tuning itself to what's here. In my case, we're picking the closest-looking lifeless planets and trying to get them to work for life from Earth, in hundreds or perhaps a few thousand years. So I wonder if boron and iodine are accessible due to astrology & geology so we'd reasonably expect there could be some available on another lifeless planet that was otherwise similar to Earth? I suppose that's another question. | |
| Dec 20, 2015 at 20:38 | comment | added | nigel222 | Not if your world is Earthlike. Here its a problem in some areas because of the regional geology. | |
| Dec 20, 2015 at 19:10 | comment | added | Dronz | Do you think I should be worried about there being enough boron & iodine? | |
| Dec 20, 2015 at 19:09 | vote | accept | Dronz | ||
| Oct 1, 2017 at 17:51 | |||||
| Dec 18, 2015 at 23:04 | history | answered | nigel222 | CC BY-SA 3.0 |