The Bethelehem Star occurs next in 60 years time and then only in another 460 years, if we take present orbits as pertaining then, which is unlikely.

Electric Universe Theory EUT, holds that the Sun and planets are driven by a great Filament greater than all the local stars.
This Electromagnetic current will reverse polarity. It seems it does so every 500 years or so. Then we have a stronger Sun, next time it will be Green.