Nasa's Kepler telescope has discovered more than 100 Earth-sized planets orbiting alien stars.
The mystery behind a the strange 'alien megastructure' could soon be solved.
A haul of planets from Nasa's Kepler telescope includes a world sharing many characteristics with Earth.
Nasa's Kepler telescope has discovered more than 100 Earth-sized planets orbiting alien stars.
The mystery behind a the strange 'alien megastructure' could soon be solved.
A haul of planets from Nasa's Kepler telescope includes a world sharing many characteristics with Earth.
