@Glenstr - I believe the show was/is How The Universe Works. I saw the same episode and am wondering the same thing. If Jupiter's "orbit" around the Sun pulls it (I thought they had said 1million kms) closer to Jupiter then there would be an effect on our temperatures. When the Sun, Earth and Jupiter are all in alignment every 12 years we should expect warmer weather for a period that we are in effect "closer" to the Sun. And thus when we are opposite with Jupiter we would experience colder temperatures.