Kitsu (kitsukatze) wrote in little_details,

Planet in binary star system

I'm working on a science fantasy novella set on an fictional planet but I've run into some problems with the physics of it all.

Terms googled: Planets in binary star systems, life in binary star systems and variations thereof. Have read a good deal, but it's still breaking my brain - I nearly botched physics in secondary school. Any help would be appreciated.

Basically, I have a planet orbiting two suns. Its orbit is circular, and the twin stars are both about the size of Sol/the Sun;

1 - How far away from the suns would it have to be to be in the habitable zone and be able to support Earthlike life? Is it even close to plausible?

2 - How large would this make the planet's orbit? In other words, how long would it make the year?

3 - I know Earth's elliptical orbit doesn't affect the seasons much, but would the planet's circular orbit around twin stars affect them at all? Or would it only be the tilt of the planet's axis relative to the plane of revolution that mattered? If there is no tilt, how would that work out? Is the planet's tilt essential for the weather/climate? I'm sort of guessing that if there was not tilt, there would be no weather to talk of.

4 - This will vary, I suppose, but what do you imagine a double sunrise would look like?
Tags: ~science: astronomy

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