Galaxies
A galaxy is a system of stars, stellar remnants, interstellar gas, dust, dark matter, bound together by gravity. The word is derived from the Greek galaxias (γαλαξίας), literally 'milky', a reference to the Milky Way galaxy that contains the Solar System.
2 episodes
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Black Holes
Melvyn Bragg discusses Black Holes, the dead collapsed ghosts of massive stars.
12 April 2001
Featuring: Martin Rees, Jocelyn Bell Burnell, Martin Ward
Galaxies
Melvyn Bragg and guests discuss the galaxies; spread out across the void of space like spun sugar, but harbouring in their centres super-massive black holes.
29 June 2006
Featuring: John Gribbin, Carolin Crawford, Robert Kennicutt