What Fills The Vast Expanse Of Space? (Video)

Is Space Really Empty

By definition, ’empty’ means devoid of matter, or lacking in substance. So when most people hear the term empty space, they assume that, indeed, space is entirely empty. Once upon a time, we thought this was true, but these days, we know that space isn’t a perfect vacuum. It, in fact, contains things we can’t even conceive of, like virtual particles, which pop in and out of existence at a black hole’s whim.

Learn more about spacetime itself and the particles inhabiting it in the video below:

WATCH: “Empty Space is NOT Empty”

Jaime is a freelance writer, who finds great joy in sharing the wonders of universe with others. She used this passion to launch "From Quarks to Quasars" in 2012.