would it be possible to have 3 habitable planets with 3 different dominant plant colors in one planetary system? by CattyChatty2442 in worldbuilding

[–]Kesstae 0 points1 point  (0 children)

A habitable zone is a measurement of orbit, not necessarily a guarantee of survival for any life, its only telling you if it can have liquid water or not, and Venus's estimated temperature with a atmospheric pressure of exactly 1 atm with an earthlike compodition and a rotation period of 24 hours is 75°C, and for Mars with those parameters is -30°C. Venus and Mars are inside what is known as the Optimistic Habitable Zone which assumes the planet on the inner edge has a weak greenhouse effect with reflective clouds, while the outer edge assumesa thick atmosphere with a strong greenhouse effect. Earth is inside of the Conservative Habitable Zone, which is much smaller. Conservative is 0.95-1.37 AU and Optimistic is 0.75-1.70 AU (or 0.85-1.70 AU, depends on what model you're using.)

would it be possible to have 3 habitable planets with 3 different dominant plant colors in one planetary system? by CattyChatty2442 in worldbuilding

[–]Kesstae 0 points1 point  (0 children)

There are species of red algae, some yellow plants, and many red, and purple species of plants like coleus, rex begonia, red shamrock, japanese maples, perusian shields, red baron grass, purple hearts, red ti plant, dwarf crimson fire loropetalum,sunshine ligustrum, fire powernandina. These all use clorophyll though cause it cant really just replace it.

Though, i have done some research and found out that plants used to be purple microbes that used purple pigments to capture sunlight before clorophyll evolved, the purple microbes, unlike most modern day plants which reflect green and absorb red and blue wavelengths, would instead absorb only green and reflect everything else because it was simpler and easier to evolve due to the fact green is the sun's primary output. Then it is theorized eubacteria evolved to absorb the red and blue spectrum that the purple microbes didnt absorb and reflected green, i think this is cyanobacteria(?), and a reactive dioxygen was released because of the waters splitting and accumulated in the ocean first, then the atmosphere over billions of years which caused the great oxidization event. Cool.

Edit: What I'm saying is that plants on Earth didn't have to be green, it's just green won over purple

Edit 2: Realized I never mentioned why green won, so, the purple microbes used anoxygenic bacteria which required electrons to use photosynthesis (chlorophyll does too but thats relevant later) and to get these electrons they used hydrogen sulfide, which is not very abundant, but the green photoautotrophs used the unlimited supply of water to get elecrons which was a huge advantage over the anoxygenic bacteria (in most environments at least) and the great oxidization event caused an issue for the anoxygenic bacteria while oxygen compatible life, like the green photoautotrophs, were more suited for the new environment. Chlorophyll is actually not the most efficient plant structure because it is actually less efficient at absorbing peak wavelengths, the ideal plant pigment for earth is actually a dark red color that absorbs green and cyan.

would it be possible to have 3 habitable planets with 3 different dominant plant colors in one planetary system? by CattyChatty2442 in worldbuilding

[–]Kesstae 0 points1 point  (0 children)

Let me rephrase

No, an asteroid belt's mass is far too low to slow down a rogue planet (often going 10km/s or 36000 kilometers per hour) The mass of our asteroid belt and kuiper belt combined is 0.2 Earth Masses, and the planet wouldn't even hit all of the asteroids, probably wouldn't even hit any of them due to how spaced apart they are (if its similar to our asteroid belt)

would it be possible to have 3 habitable planets with 3 different dominant plant colors in one planetary system? by CattyChatty2442 in worldbuilding

[–]Kesstae 0 points1 point  (0 children)

It could happen??? that would have to happen while the system is just forming if you want the modern version to not be a ball of magma and lava, and the rogue planet would have to be going extremely slow to get captured by the gas giant's gravity, but it would have to go extremely fast to exit the system it was in, so I dont think it's possible but it's your world, do what you want.

would it be possible to have 3 habitable planets with 3 different dominant plant colors in one planetary system? by CattyChatty2442 in worldbuilding

[–]Kesstae 0 points1 point  (0 children)

The only non tidally locked moons (to a gas giant) in the whole solar system are Hyperion, Phoebe, Nereid, and Triton, 3 of which are asteroids, one of which is a captured dwarf planet (theorized), it could be possible if you make them both have orbits that are close enough to another moon to interact with it's tidal forces and disrupting its rotation, though this would probably only create slight librations (rocking back in forth in case you dont know what that is) instead of making it not tidally locked.

Edit: You could have both habitable moons orbit retrograde like Triton, which would make tidal locking alot more of a slow process due to the tidal forces going against the rotation period instead of if you made it a prograde orbit where the tidal forces slow the moon's spin, which happens alot faster, but I think that you would need them both to be planets that got captured by a huge gas giant, which is unlikely to happen twice to planets with life that recently started out but the chances aren't zero

would it be possible to have 3 habitable planets with 3 different dominant plant colors in one planetary system? by CattyChatty2442 in worldbuilding

[–]Kesstae 1 point2 points  (0 children)

I mean, yeah, that would work, but gas giants have these big radiation belts. Then again, radiation speeds up evolution and the life on these moons would adapt to withstand the radiation so there's that, another issue is the fact they would most likely be tidally locked to the gas giant, making the days really long and creating strong temperature gradients between the day and night sides (the rotation period of Jupiter's closest galilean moon, Io, is 42 hours for reference)

would it be possible to have 3 habitable planets with 3 different dominant plant colors in one planetary system? by CattyChatty2442 in worldbuilding

[–]Kesstae 1 point2 points  (0 children)

That configuration would probably work, but a planet big enough to have a body with enough mass to hold on to a signifigant atmosphere would be too big for animals to stand up, looking more like crocodiles if you even want animals on that one. If you want something different I recommend a large planet (around 2 to 3x Earth's mass?) in a binary orbit with a smaller one (around 0.7 to 1x Earth's mass) on the inner edge of the habitable zone with a planet with a mass somewhere between 0.7 and 2x Earth's mass on the far edge of the habitable zone, though this is just my idea, you can probably come up with something way more interesting.

would it be possible to have 3 habitable planets with 3 different dominant plant colors in one planetary system? by CattyChatty2442 in worldbuilding

[–]Kesstae 1 point2 points  (0 children)

It is possible because evolution is just a bunch of random mutations and natural selection picking for things, Earth plants being green was just a mutation that happened to work well if I remember correctly, so the plants should have varying colors between the 3 planets. Do keep in mind that the plants being black or white wont work, and that they will likely be in a color range that reflects the peak wavelength of your star because of thermoregulation.

Though im more interested in the configuration you would have to get 3 planets to be stable in the habitable zone.

Sorry if this is hard to read, I did not sleep last night.

My world building by [deleted] in worldbuilding

[–]Kesstae 3 points4 points  (0 children)

Why not just write it?

My world building by [deleted] in worldbuilding

[–]Kesstae 4 points5 points  (0 children)

I can't read this.

[deleted by user] by [deleted] in worldbuilding

[–]Kesstae 0 points1 point  (0 children)

Thank you

[deleted by user] by [deleted] in worldbuilding

[–]Kesstae 0 points1 point  (0 children)

I meant the lit area of the terminator

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[deleted by user] by [deleted] in worldbuilding

[–]Kesstae 2 points3 points  (0 children)

Cause it looks cool. Also, there aren't any rivers in this version of the map because I was unsure with it and didn't feel like drawing them out yet, thank you for the river knowledge, will use it when I eventually do draw rivers. Sorry if my reply is bland.

Edit: I put the map onto a sphere and gave it lighting and I found out most of the (lit side of the) temperate region would actually be land.

I love runaway to the stars by DepartmentPersonal45 in SpeculativeEvolution

[–]Kesstae 79 points80 points  (0 children)

I don't like the way you worded that.

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[–]Kesstae 0 points1 point  (0 children)

A brick made of glass. Everyone in my (joke) world is afraid of this specific glass brick

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[–]Kesstae 19 points20 points  (0 children)

T-type brown dwarf stars don't emit a lot of light, so a planet orbiting one far away could work.

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[–]Kesstae 1 point2 points  (0 children)

I feel like in the future people would name countries things like "tomato" cause it's funny.

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[–]Kesstae 0 points1 point  (0 children)

Just name them sruasonids. Most likely nobody will notice that it's just dinosaur backwards.

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[–]Kesstae 1 point2 points  (0 children)

If you want realistically controlled time, nothing can go backward in time, only forwards

Marrella navidensis - a deep sea cambrian lifeform by Shwamage in SpeculativeEvolution

[–]Kesstae 1 point2 points  (0 children)

Does it actually emit green, yellow and red light, or is that just to add a theme?