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Why Venus Has a Longer Day Than Year
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Transcription
Venus rotates once in 243 Earth days, but orbits the Sun in just 225 days..
That means a Venusian day lasts longer than its year..
The Sun’s gravity raises tides in Venus’s solid body, gradually braking its spin..
Solar heating may drive tides in the atmosphere, pushing back against that braking..
These competing effects may balance, leaving Venus with a slow, backward spin..
The exact origin of Venus’s unusual spin remains uncertain.
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