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the claim

The Moon always shows the same face to Earth because its rotation period equals its orbital period.

the verdict
SUPPORTED
the evidence backs this
Recorded sources
7 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that the Moon always shows the same face to Earth because its rotation period equals its orbital period?

Yes. A Wikipedia article states that the Moon is tidally locked in a 1:1 spin-orbit resonance, so its orbital period equals its rotation period, which keeps nearly the same face toward Earth. Other sources describe the Moon's synchronous rotation and same-face presentation, and one defines synchronous rotation as rotation period equaling orbital period for exoplanets.

Verdict: SUPPORTED · 7 sources for, 0 against · Last checked

The private library was unavailable for some searches in this check. Missing library results are not evidence against the claim.

Evidence for · 7
Earth’s Moon
2013
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Earth’s Moon. (2013). doi.org. https://doi.org/10.1017/cbo9781139020961.006

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More for · 6
Is the Moon's rotation affected by Earth's?
2019
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Is the Moon's rotation affected by Earth's?. (2019). physics.stackexchange.com. https://physics.stackexchange.com/questions/503471/is-the-moons-rotation-affected-by-earths

Bodily tides near the 1:1 spin-orbit resonance. Correction to Goldreich's dynamical model
2012
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Williams, J. G. & Efroimsky, M. (2012). Bodily tides near the 1:1 spin-orbit resonance. Correction to Goldreich's dynamical model. arxiv.org. https://doi.org/10.1007/s10569-012-9446-7

Moon - Wikipedia
Get citation
Moon - Wikipedia. (n.d.). en.wikipedia.org. https://en.wikipedia.org/wiki/Moon

IS THERE WATER ON THE MOON. (Daily Telegraph, 06 September 1882)
1882
Get citation
IS THERE WATER ON THE MOON. (Daily Telegraph, 06 September 1882). (1882). paperspast.natlib.govt.nz. https://paperspast.natlib.govt.nz/newspapers/DTN18820906.2.21

ARC-1979-AC79-7002
1979
Get citation
ARC-1979-AC79-7002. (1979). images.nasa.gov. https://images.nasa.gov/details/ARC-1979-AC79-7002

Continuous reorientation of synchronous terrestrial planets due to mantle convection.
2018
Get citation
J, L. (2018). Continuous reorientation of synchronous terrestrial planets due to mantle convection.. doi.org. https://doi.org/10.1038/s41561-018-0071-2

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