'Mega-Earth' planet discovered
- 3 June 2014
A brand new type of rocky planet has been discovered.
Kepler-10c is being called a 'mega-Earth' - a new type of planet that has a hard surface, like our own world, but is much, much bigger.
In fact Kepler-10c itself is thought to be about 17 times the mass of our Earth.
It orbits a star about 560 light-years away and was detected by Nasa's Kepler telescope.