New experimental results on methane may help us to uncover whether Uranus really is the coldest planet.
The Voyager space probes sent back some amazing images of the planets in the outer Solar System, and they're still talking to Earth every day via Australia's tracking station.
Why Planet Nine should be found in the next few years ... if it exists.
How a bunch of pebbles could have created Jupiter, Saturn, Neptune and Uranus.
Space scientists have a busy decade ahead with plans to visit Jupiter, Mars, Mercury and other interplanetary bodies all on the cards.