IE 11 is not supported. For an optimal experience visit our site on another browser.
  • How to watch the rare parade of planets

    01:10
  • Did Chinese researchers pick up signals from alien civilizations?

    01:58
  • The search is on for woman rejected from NASA 60 years ago

    03:25
  • Now Playing

    NASA scientists resynthesize black hole pressure waves to hear sound

    04:28
  • UP NEXT

    Boeing’s Starliner launches to International Space Station after delays

    01:20
  • Astronauts answer questions from the International Space Station

    09:06
  • Congress to hold public hearings on UFOs for first time in 50 years

    01:52
  • WATCH: Video shows astronauts return to Earth with SpaceX splashdown

    02:01
  • SpaceX Crew Dragon capsule docks with space station ahead of schedule

    00:57
  • NASA, SpaceX launch 4 astronauts to International Space Station

    03:02
  • SpaceX's first all-civilian crew splashes down off Florida coast

    01:45
  • U.S. announces self-imposed ban on ‘dangerous’ anti-satellite missile tests

    03:49
  • Moon dust collected by Neil Armstrong sells at auction for $500,000

    00:20
  • Axiom crew arrives at ISS

    01:29
  • Watch: All-civilian crew arrives at International Space Station

    01:05
  • Axiom's mission to ISS sets stage for private space station

    01:24
  • Watch: SpaceX, Axiom launch first private mission to ISS

    01:27
  • First ever all-private spaceflight to the ISS set to launch

    03:06
  • The future of the international space station in question

    01:47
  • NASA runs final tests on rocket for Artemis I mission

    00:42

NASA scientists resynthesize black hole pressure waves to hear sound

04:28

A black hole at the center of the Perseus Galaxy sends out pressure waves that can be translated into a note. NBC News’ Harry Smith is joined by Erin Kara, an assistant physics professor from MIT, to discuss how scientists at NASA resynthesized those notes to allow humans to hear the sound of the phenomenon.