Invisible Universe
Chris Riley goes in search of elusive dark matter, and Dr Kathy Sykes talks to Jocelyn Bell-Burnell, the legendary astronomer who discovered pulsars while doing her doctorate.
Despite fantastic advances in technology, over 90% of our Universe appears to be missing. In this second programme of the series Chris Riley goes in search of this elusive so-called 'dark matter', a trail which leads him to an unlikely location - Europe's deepest mine, 1000m beneath the earth's surface. Also we meet Jocelyn Bell-Burnell, the legendary astronomer who discovered a very strange body in the late 1960s - the 'pulsar', a star so dense that a single teaspoon could weigh a hundred million tons. And we explore our nearest neighbour, the Moon, and find out why its surface could be more precious than gold dust. And we explore our nearest neighbour, the moon, and find out why its surface could be more precious than gold-dust.
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Jocelyn Bell Burnell discovers pulsars
Duration: 05:03
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Mapping dark matter
Duration: 01:51
Broadcasts
Wed 28 Feb 2001 08:30ÃÛÑ¿´«Ã½ Knowledge
Wed 28 Feb 2001 11:30ÃÛÑ¿´«Ã½ Knowledge
Wed 28 Feb 2001 14:30ÃÛÑ¿´«Ã½ Knowledge
Wed 28 Feb 2001 17:30ÃÛÑ¿´«Ã½ Knowledge
Wed 28 Feb 2001 20:30ÃÛÑ¿´«Ã½ Knowledge
Wed 28 Feb 2001 23:30ÃÛÑ¿´«Ã½ Knowledge
Sun 27 May 2001 09:00ÃÛÑ¿´«Ã½ Knowledge
Sun 27 May 2001 12:00ÃÛÑ¿´«Ã½ Knowledge
Sun 27 May 2001 15:00ÃÛÑ¿´«Ã½ Knowledge
Sun 19 Aug 2001 09:00ÃÛÑ¿´«Ã½ Knowledge
Sun 19 Aug 2001 12:00ÃÛÑ¿´«Ã½ Knowledge
Sun 19 Aug 2001 14:55ÃÛÑ¿´«Ã½ Knowledge
Wed 26 Sep 2001 20:00ÃÛÑ¿´«Ã½ Knowledge
Mon 28 Jan 2002 10:30ÃÛÑ¿´«Ã½ Knowledge
Mon 28 Jan 2002 13:30ÃÛÑ¿´«Ã½ Knowledge
Mon 28 Jan 2002 16:30ÃÛÑ¿´«Ã½ Knowledge