It's estimated there may be trillions of rogue planets wandering through the Milky Way, unbound to any star. Since detecting our first ones, we have been presented with an odd mystery.

From the Upside Down through the Devil's Anus and beyond. Here are 6 times these theoretical wormholes turned up in sci-fi ...

How does a star affect the makeup of its planets? And what does this mean for the habitability of distant worlds? Carnegie's ...