The Cold Spot

Making enormous swaths of nothingness is what the universe excels at, if anything. TopTenz previously paid homage to the Bootes Void and its 330 million lightyears of emptiness, but we've now learnt that it's a lot smaller than one found in 2005. The length of this supervoid has been calculated to be 1.8 billion lightyears. Not without reason, it has been termed the "supervoid." Yet, since it is three billion lightyears away, you need not worry about ever getting trapped in it.

It has been discovered to be a significant factor in why galaxies on its outer edges are considerably cooler than usual since it is so devoid of stars and other materials to generate heat through a variety of chemical processes. It's also important to keep in mind that nature generally despises empty spaces like the supervoid and the like, with scientists pointing out that stuff is largely spread equally across the rest of the cosmos. Thus it is not a stretch to claim that the supervoid is one of the greatest mysteries in the cosmos.