posted on Dec, 30 2007 @ 06:38 AM
Whilst a hitherto undiscovered companion brown dwarf star - orbiting maybe a light year out and occasionally perturbing comets - is possible, for such
a star to approach the inner system on a regular basis would simply mean we wouldn't be here. Our presence on a planet with a stable, near
circular, orbit proves such a body does not exist.
In any case, the idea any such body approaching the inner system was invented by Zechariah Sitchin in the 1970s.
As for being visible only from Antarctica, that too is physically impossible. Any body in the southern sky would be visible at some point of the year
from every place in the S Hemisphere. And body close to the Sun would be visible from every single place on the planet.
Simple fact is: it does not, and cannot, exist.