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-1

I believe a LOT would change. As someone who lives in the Northern hemisphere; we are closer to the sun during the winter months, but just a few more hours of daylight has a massive temp change. This change is 20-40 degrees colder compared to the summer months and we are over a million miles closer to the sun at this time. If Venus had a moon of its own ...


5

It's certainly possible such a system could be stable in the long term. Barring the consideration of what exactly we're talking about (in terms of planets and stars) what you're describing is referred to as a hierarchical system. Effectively you have two bodies orbiting quite close to each other (in your case, two planets of similar Earth-comparable masses). ...


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