Pluto (which some scientists now call a dwarf planet) was visited by the New Horizons spacecraft on July 14th 2015. This is what it saw. Compare it to what the diagram shows below. The diagram was made from the best that space telescope Hubble could see. Now, for example, we know it is an orangey colour. Before, scientists guessed at blue. The picture shows both Pluto and its moon Charon.

Pluto.

Pluto is only 2,300 kilometres across, smaller than the Moon.

Pluto is a small rocky planet near the edge of the Solar System. It has one moon, called Charon. The moon is half its size and is only 20,000 kilometres from the planet. Pluto and its moon spin around in space like two people dancing together.

Pluto is the smallest planet and quite unlike the neighbouring giant planets.

Some scientists think Pluto is really no more than a large asteroid. Because of its distance from the Earth, and its small size, it was not discovered until 1930.

Pluto orbits the Sun once every 248 years at a distance of 5.9 billion kilometres, marking the very edge of the Solar System.

Pluto is a frozen world with an atmosphere of methane gas enveloping a cold rocky core.

Pluto has mountains made of ice that are as high as those in the Rockies, images from the New Horizons probe have revealed. They also show signs of geological activity on Pluto and its moon Charon.