Or maybe theere are 2 sun's scorching the earth equally from both sides. Since Earth is located perfectly in the middle, the gravitational forces balance each other. Everything is symmetrical. Then, once upon hundred years or so 2 super planets that are close to earth block the sun from either side effectively achieving 2 simultaneous eclipses that last about 1/4th night time. After they pass another set of super planets perform 2 other simultaneous eclipses from both sides again lasting for 1/4 night time. These happens 4 times in total with 8 super planets from both sides periodically blocking the sun from both sidez and then switching with another planet to continue the job.

After the last planet from both solar systems has passed it would take a century or so for the first planet of each system to come and block the sun again.

Results: I don't see a moon in this equation. Stop talking madness! [@DracoLunaris]