Avsnitt 6

The solar system and its planets seem like a familiar place. Yet scientists now think they've detected something huge lurking in the far reaches of the system we call home. Could it be that a missing, giant ninth planet orbits our sun in the dark reaches of space? We'll meet the astronomers hunting for this hypothetical world . Scientists who are only now beginning to understand how such a massive planet could have ended up so far away from the Sun - way beyond where science predicts planets can form. We join teams in the UK, Germany and the United States who are ...