Main content
Bob Nichol Explains Dark Matter
Astrophysicist Professor Bob Nichol explains how observations of the speed of stars in spiral galaxies made scientists realise there was more out there than we thought.
Duration:
This clip is from
More clips from Dancing in the Dark - The End of Physics?
-
![]()
Web exclusive:The Congregation Perform 'Record Collection'
Duration: 04:08
-
![]()
Trail: Horizon - Dancing in the Dark
Duration: 03:32
-
![]()
Dave the atom smasher
Duration: 01:25
-
![]()
Ignoring your superiors
Duration: 02:27
More clips from Horizon
-
![]()
The results are in...—2021, Horizon Special: The Vaccine
Duration: 02:02
-
![]()
Pluto鈥檚 first pictures—2020, Pluto: Back from the Dead
Duration: 02:30
