Venus takes about 243 Earth days to spin once on its axis, longer than its 225-day year, although because it spins backward the Sun rises there about every 117 Earth days.
Sources
- https://www.universetoday.com/articles/rotation-of-venus (universetoday.com)
- https://spaceplace.nasa.gov/all-about-venus/en/ (spaceplace.nasa.gov)
- https://www.britannica.com/place/Venus-planet (britannica.com)
- https://www.aeronomie.be/en/encyclopedia/venus-backwards-rotation-and-orbital-period (aeronomie.be)
- https://en.wikipedia.org/wiki/Venus (en.wikipedia.org)
- https://www.space.com/venus-atomphere-slows-down-rotation (space.com)
- https://science.nasa.gov/venus/venus-facts/ (science.nasa.gov)
- https://www.asc-csa.gc.ca/eng/astronomy/solar-system/venus.asp (asc-csa.gc.ca)
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