Does a binomial star system explain the formation of planets and how long untill our sun's sister comes back

Question

Scary thought. Every 700 Million years. Now, give or take 100,00 years.

Answer 1

You must mean "binary". No, it doesn't explain how our planets formed in any particular sense, and no it doesn't have anything to do with our supposed "sister sun".

Our system does not have a second star. We would have felt its gravitational effects, its effects on solar wind as well as a host of other solar phenomena, and most importantly, we would have seen it by now!

Answer 2

I think you mean a "binary" star system.
"Binomial" is a term from a different area of knowledge.