Just as scientists can see/predict when an asteroid or comet is heading in our viewpoint, they can surely use computer models to predict galatic alignment, and it is indeed probable and likely.

the mayan calendar doesn't predict the end of the world, it talks about the end of one era into another, a new beginning. the mayans accurately predicted astrological/astronomical events before they occured. How is this possible, cycles! Everything is a cycle. Approximately every 25,000-26,000 years this alignment occurs.

so instead of turning my hypothetically and realistic questions into a mockery, do some research.

thank you to those who gave me useful information.