Main content
The first discovery
Professor Jim Al-Khalili speaks to Dr Paul Murdin about how he was the first person to identify a black hole.
Duration:
This clip is from
More clips from Dark
![]()
Dark energy
Duration: 04:07
![]()
Galactic rotation
Duration: 01:55
![]()
The dark ages of the Universe
Duration: 01:33
More clips from Light and Dark
![]()
Dark energy—Dark
Duration: 04:07
![]()
Galactic rotation—Dark
Duration: 01:55
![]()
The dark ages of the Universe—Dark
Duration: 01:33
![]()
Galileo's observations—Light
Duration: 02:40
