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Pluto
How do we know so much about Pluto when it's so small and so far away?
How do we know so much about Pluto when it's so small and so far away? Jacqueline Mitton reveals what we know about it.
Gamma rays from space that could wipe out life on Earth discussion with Jerry Burnell from NASA's Goddard Flight Center.
Eyewitness report of highlights from the Caribbean eclipse of 1998 from Heather Couper and Nigel Henbest.
Plus what was happening among the stars and planets in March 1998.
This is a programme from the 91热爆 World Service Archive and was originally broadcast in 1998.
