Exoplanets are planets that orbit other stars, not our star the Sun. Look at this great drawing of exoplanets from the comic xkcd. There are a lot of planets out there, beyond our own solar system. Will we ever visit any of them? Is there life on any of them? And what kind of life – intelligent, bacterial, multi-cell?
Watch this video clip from Nova Science NOW to see how astronomers find these planets around other stars.