After running several simulations , he realizes that the death sphere is the result of a collision between two artificial satellites that were launched into Earth 's orbit in 1998 .
Professor Farnsworth soon discovers that the death sphere is headed for Earth .
After running several simulations , Farnsworth realizes that the death sphere is the result of a collision between two artificial satellites that were launched into Earth 's orbit in 1998 .
Professor Farnsworth soon discovers that the death sphere is headed for Earth .