You've just
tried to add this video to your Watchlist so you can watch
it later. But first, we need you to sign in to PBS using one
of the services below.
You’ll be able to manage
videos in your Watchlist, keep track of your favorite shows,
watch PBS in high definition, and much more!
You've just
tried to select this program as one of your favorites. But
first, we need you to sign in to PBS using one of the
services below.
You’ll be able to manage videos in
your Watchlist, keep track of your favorite shows, watch PBS
in high definition, and much more!
To get you
watching PBS in high definition we need you to sign in to
PBS using one of the services below.
You'll be able
to manage videos in your Watchlist, keep track of your
favorite shows, watch PBS in high definition, and much more!
By creating an account, you acknowledge that PBS may share your information with our member stations and our respective service providers, and that you have read and understand the Privacy Policy and Terms of Use.
One More Thing …
Become a WVIZ member to enjoy
WVIZ | Passport
Look for the blue icon to identify WVIZ Passport videos.
Hook up an old antenna to your TV and scan between channels. The static buzz you hear is mostly due to the ambient radio produced by our noisy pre-galactic civilization. But around one percent of that buzz is something very different – it’s the cosmic microwave background radiation.
![Video thumbnail: PBS Space Time How Black Holes Need Galaxies [NEEDS ASSETS]](https://image.pbs.org/video-assets/e72ZlZ9-asset-mezzanine-16x9-K523IRE.jpg?crop=1534x864&format=webp)
