Most galaxies include something you'd know as a sun. They're actually called stars, and a number of those stars include planets orbiting them. In some cases, there are solar systems with two to four stars, but I don't want to try anything crazy or ambitious, even if such things might give me anxieties and weird dreams, or nightmares, eventually.
Let me showcase the stars of other biosphere projects, in terms of their mass:
Alien Biospheres: 92% that of ours, or 0.92 sol
Rubiea Biospheres: 1.2 sol
LAaRDS: same as Trappist-1
Luminosity:
Alien Biospheres: 0.75 sol
Rubiea Biospheres: 1.23 sol
LAaRDS: look it up
Habitable Zones:
Alien Biospheres: 0.83-1.19 AU
Rubiea Biospheres: 0.97-1.37 AU
LAaRDS: look it up
On second thought, let's keep red dwarfs out of this.
For my star, after typing a few numbers(one of them being from adding his final star mass of ??? to 0.92 sol and dividing by 2) and not earning the preferred star color, as well as deciding/not deciding the current phase of the star's lifespan, I aimed for 0.975 sol, with the current amount of years of existence so far being 4.046 billion of our Earth years. And with the luminosity at 90.4% that of the Milky Way's star, the habitable zone is 0.906-1.306 AU.
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A Custom Biosphere with Conlangs
RandomBased on a spreadsheet I copied from Edgar Grunewald of Artifexian.
