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Transit of Mercury
The importance of a transit of Mercury - discussed by Allan Chapman of Oxford University
The importance of a transit of Mercury - discussion with Allan Chapman of Oxford University.
All about Leonids with David Asher of Armagh Observatory.
Plus what was happening among the stars and planets in November 1999.
This is a programme from the Βι¶ΉΤΌΕΔ World Service Archive and was originally broadcast in 1999.
