>Its big, so big it gave the planet its wobble, the comet, the precession, the tilt - its all related.
sry
CLOSE, but NO CIGAR
a comet can't do that
nowhere near the necessary mass
what IS coming is the sun's brown dwarf companion star
95% of all visible stars are binary systems
it would be an anomaly of the highest order if our sun DIDN'T have a binary companion
not to worry, it AIN'T gonna hit anything
it's BEEN coming around once every 25,000 yrs, (same period as the precession) and it hasn't caused any catastrophes
at least not recently
what WILL happen is it will drag behind it a slew of gravitationally entrained comets
THAT will raise the chances of comet impact with earth by a VERY slight amount