Khemehekis wrote: ↑05 Aug 2023 23:09
<snipped because my post is too long>
All right, thanks! Kankonian is beautiful.
Khemehekis wrote: ↑05 Aug 2023 22:52
These calculations would require working out the mass of solar system's sun (Refea, in this case), and deciding on the number of AU of each planet from the sun. In the case of Refea, I want green plants, and I want multiple planets to be able to sustain life. I just haven't done the research yet on how to make that all work out.
Artifexian's
Worldsmith spreadsheet should help you out.
But also, any color of pigment is fine for any planet as long as it's not too unearthly in terms of light receiving. The asteroid belt, for example, would probably evolve fairly pale plants. But if you have, say a 1.2 solar mass sun and you're 1.18 AU away from it ─ any fairly Earthlike values ─ you can have any color plants you like.
But multiple planets sustaining life is hard. I ran through a bunch of calculations, and, for the maximum stellar mass that survives long enough to even have Earthlike life (1.4 solar masses), you need to satisfy these equations, where
x is the innermost orbit (0.4 AU for our solar system; this can probably vary a fair bit),
y is the spacing factor (around 0.3 for our solar system; I don't think this can very vary much), and
n is a positive whole number.
Code: Select all
1.869 < x + (y * 2^n) < 2.692
1.869 < x + (y * 2^n-1) < 2.692
x > 0
y > 0
For
n = 1, this is only possible in a tiny triangle of values, according to my calculations. All of these potential solutions require
x to be around 2 - 2.5 or
y to be over 0.5, in which case
x is still over 1. A relatively plausible set of values I could find in it are
x = 1.45 and
y = 0.42. This is still rather hard to believe, but it gets you this solar system (not all slots have to be occupied, except #1; an asteroid belt will take up one of these slots, right before your first gas giant):
Planet #1 at 1.45 AU
Planet #2 at 1.87 AU (habitable)
Planet #3 at 2.29 AU (habitable)
Planet #4 at 3.13 AU
Planet #5 at 4.81 AU
Planet #6 at 8.17 AU
── gas giants after this location ──
Planet #7 at 14.89 AU
Planet #8 at 28.33 AU
Planet #9 at 55.21 AU
But we get more acceptable values with
n = 2. My favorite is
x = 1.29,
y = 0.31, which gives us:
Planet #1 at 1.29 AU
Planet #2 at 1.60 AU
Planet #3 at 1.91 AU (habitable)
Planet #4 at 2.53 AU (habitable)
Planet #5 at 3.77 AU
Planet #6 at 6.25 AU
── gas giants after this location ──
Planet #7 at 11.21 AU
Planet #8 at 21.13 AU
Planet #9 at 40.97 AU
Planet #10 at 80.65 AU
Wow, sorry for this looooong post! I got carried away in the fun math.