De planetenrovers

Runaway World. Within hours after the Lunar observatory picked up a strange new X-ray source in Cygnus, the disastrous picture was clear. An immense object was hurtling toward the Solar System at nearly the speed of light...and its intense radiation would surely wipe Earth free of all life within six months.
There was nothing anyone could do.
Then, incredibly, the rogue that had appeared out of nowhere suddenly changed its trajectory and stopped in the area of Jupiter.
And that was flatly impossible!