Strange structures of space: a weird quiz

Space is full of wonders, but some celestial structures defy explanation. From vast rings that encircle stars to mysterious voids that seem to swallow light, the cosmos is a playground for the bizarre.

Scientists have spotted formations that challenge our understanding of physics, and theorists have dreamed up megastructures that could power entire civilizations.

This crossword quiz explores the weirdest of the weird, real astronomical anomalies, speculative alien engineering, and everything in between.

Whether it's a hexagon on Saturn or a star that dims like clockwork, each clue will test your knowledge of the universe's strangest sights.

Try it out below and see how well you score!