New from Chris Ferrie, the No 1 science author for kids! Pluto the planet Was really quite proud. But at the party of planets, it wasn't allowed... Scientists have determined that Pluto is a minor planet and is no longer considered one of the main planets of the Solar System. But that doesn't mean we don't love Pluto and the other minor planets in the universe! From the team behind the adorably popular '8 Little Planets' comes a new tale about the planet who no longer fits in. Illustrated by Lizzy Doyle.