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Close Encounters of a Planetary Kind

Which planet is closest to Earth?

Which planet is closest to Earth? A 麻豆社 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)

Available now

9 minutes

Last on

Tue 22 Jan 2019 02:50GMT
麻豆社 World Service

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Broadcasts

  • Sat 19 Jan 2019 05:50GMT
    麻豆社 World Service except East and Southern Africa & South Asia
  • Mon 21 Jan 2019 13:50GMT
    麻豆社 World Service except News Internet
  • Tue 22 Jan 2019 02:50GMT
    麻豆社 World Service

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