The concluding part of Prof. Brian Cox’s brilliant series takes us to the outermost planets in the solar system.
We examine worlds that we have only ever visited once. There is Uranus, the coldest planet in the Solar System and which appears to be almost featureless. Neptune meanwhile is a planet that is home to moons that originally resided in the furthest edges of the solar system.
Lastly, there is the world we once thought was a planet, but isn’t – Pluto. It even turns out “dwarf planet” is active, with ice valances, geysers, and that heart-shaped plateau – which is strangely absent of craters.
The Planets is on BBC Two at 21.00.