1/10Dr Chris and Dr Xand learn about gravity.(R)
2/10Dr Chris and Dr Xand learn about meteorites and what happens when they land on Earth.(R)
3/10Dr Maggie discovers some clever coral that can tell the time.(R)
4/10Dr Chris and Dr Xand find out about the moon and how it affects our oceans and tides.(R)
5/10Dr Maggie fires lasers at the moon to measure just how far away it is.(R)
6/10Dr Chris and Dr Xand learn about satellites and how thousands are orbiting the Earth.(R)
7/10Dr Chris and Dr Xand learn about satellites and how they move around in space.(R)
8/10Professor Brian Cox explains what the weather is like on other planets.(R)
9/10Dr Chris and Dr Xand learn about sunlight and the incredible Northern Lights.(R)
