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Vanishing Planets
Iain Nicholson on the phenomenon of occultation when the moon passes in front of Saturn
Iain Nicholson on the phenomenon of occultation when the moon passes in front of Saturn.
Jerry Gilmore of the Institute of Astronomy of Cambridge on galaxies colliding violently.
Plus what was happening among the stars and planets in November 1997.
This is a programme from the 91热爆 World Service Archive and was originally broadcast in 1997.
