More ideas from Andy

billion light-years away. there is a void in space 1 billion light-years across. It is completely empty of both normal matter and dark matter. It emits no detectable radiation or light of any kind.

"The two largest pieces of the Universe that we know the least about, yet nothing less than the ultimate fate of the Universe will be determined by them."

Dark matter and dark energy have always freaked me out/interested me ever since watching Discovery Channel specials about them.