Wandering Giants

Out of chas came order, as from the dust and gas of the very early Solar System emerged the gas giants. Four billion years ago our solar system looked quite different to the one we see today with Uranus and Neptune much closer to the Sun and regularly swapping orbits. Patrick Moore discusses how these wandering giannts came to be flung to the icy outer regions of our solar system whilst outside Chris Lintott takes a closer look at the largest of them all - Jupiter.