universe sandbox 2 how to make a habitable planet

The position of Alpha Centauri B is close enough to warm the outer habitable zone a bit, ensuring a planet on the outer edge wouldn't be cold and dead like Mars.

This results in a much wider habitable zone stretching from ~1 AU to ~3 AU (ours goes from ~0.7AU to ~1.3AU). Though Chronos life span would end much more violently with a supernova. This allows a net luminosity 3.4x that of our sun, without the staggering drop in star lifespan that a single star of that luminosity would have allowing a 8 Gyrs lifespan vs. I started with Alpha Centauri, and combined Alpha Centuari A with Chi Draconis to make a Contact Binary. I came up with a star system with a focus on maximising the number of habitable planet it can contain. We also encourage users to register an account. (#worldbuilding on :6667, or 6697 for SSL)

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Universe sandbox 2 how to make a habitable planet