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Transit of a planet across the Sun |
  
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Transit of a planet across the Sun |
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A transit of Venus across the Sun can occur only when the Sun is within 1° 45' of the Node, and the Earth is passing the Node. These occur in pairs - the last two in 1874 and 1882. The next recurrence will be June 8, 2004, and June 6, 2012. Mercury transits are more frequent.