Could Dyson spheres exist in our galaxy?

Now Playing

Could Dyson spheres exist in our galaxy?

05:08

UP NEXT

Northern lights dazzles coast-to-coast amid solar storm

02:14

NASA scrubs Boeing’s Starliner launch

03:23

SpaceX plans a new mission that will include the first private space walk

05:30

Polaris Dawn crew talks to TODAY ahead of spacewalk

04:34

Boeing’s Starliner to launch NASA astronauts after years of delays

02:41

China launches spacecraft to explore far side of moon

01:31

China launches its Chang’e-6 mission to the far side of the moon

01:01

NASA graduates new astronauts for Orion capsule mission

03:23

Space Camp gets new generation of explorers ready for launch

04:29

Excitement builds across U.S. as Americans gear up for solar eclipse

05:44

Neil deGrasse Tyson explains how a solar eclipse happens

10:50

NASA astronaut details what training is like to go to space

06:57

NASA posts job for full-time astronauts: Here are the requirements

03:16

Flipping the Script: ‘The Space Race’ documentary spotlights Black astronauts

04:13

Latest SpaceX launch called successful as new astronaut class introduced

01:50

SpaceX declares Starship launch a success

02:21

Watch: Highlights from SpaceX’s third Starship test flight

01:33

WATCH: SpaceX successfully launches third Starship test flight

00:30

Watch: Japan’s Space One rocket explodes during launch

01:18