Pioneer 10 and 11, the space probes that recently left the solar system on their journey to distant stars, are moving in ways inconsistent with the predictions of physicists. Possible reasons include unseen "dark matter" outside the edge of the solar system, gas leaks from the fuel tanks of both space probes coincidentally happening simultaneously, or the possibility that Newton didn't get the whole story right about gravity. Funny, nobody mentioned the idea of an Imperial Star Destroyer catching them in a tractor beam.