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Close Encounters of a Planetary Kind
Which planet is closest to Earth?
Which planet is closest to Earth? A 成人快手 programme 鈥楾he Sky at Night鈥� said it was Mars. But a listener isn't so sure. Tim Harford talks to David A. Rothery, professor of planetary geosciences at the Open University.
Producers: Ruth Alexander, Bethan Head
Presenter: Tim Harford
(Earth and surrounding planets/Getty images)
Last on
Tue 22 Jan 2019
02:50GMT
成人快手 World Service
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- Sat 19 Jan 2019 05:50GMT成人快手 World Service except East and Southern Africa & South Asia
- Mon 21 Jan 2019 13:50GMT成人快手 World Service except News Internet
- Tue 22 Jan 2019 02:50GMT成人快手 World Service
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