Episode details
Available for over a year
The invasion of probes to Mars with Kelly Beatty of Sky and Telescope Magazine. The moon formed when the Earth experienced a large impact - discussion with Lunar Prospector mission manager Scott Hubbard. Plus what was happening among the stars and planets in April 1999. This is a programme from the ÃÛÑ¿´«Ã½ World Service Archive and was originally broadcast in 1999.
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