niburu or planet x was supposed to have some affect on the earth's atmosphere and gravity. i read up on this planet long ago. most i've forgot, but i do think that while most planets had a somewhat horizontal orbit around the sun, while this planet x orbitted vertically. whenever it was the closest to the sun, it would affect the earth and cause drastic weather changes. of course, this was all written by doomsday scientists and was most likely bullshit. they were all different theories though. interesting stuff.