Venus rotates so slowly that a day on Venus (243 Earth days) is longer than a year on Venus (225 Earth days).
Notes on verification
Verified through NASA planetary data and radar mapping missions to Venus [2026-08-28 re-verified orphan: promoted with 6 independent source(s)] [2026-08-29 audit re-verified: 4 independent source(s)] [2026-08-29 audit re-verified: 4 independent source(s)]
Sources
- https://www.universetoday.com/articles/rotation-of-venus (reverify-primary)
- https://spaceplace.nasa.gov/all-about-venus/en/ (corroboration)
- https://www.britannica.com/place/Venus-planet (corroboration)
- https://www.aeronomie.be/en/encyclopedia/venus-backwards-rotation-and-orbital-period (corroboration)
- https://en.wikipedia.org/wiki/Venus (corroboration)
- https://www.space.com/venus-atomphere-slows-down-rotation (corroboration)
- https://science.nasa.gov/venus/venus-facts/ (audit-corroboration)
- https://www.asc-csa.gc.ca/eng/astronomy/solar-system/venus.asp (audit-corroboration)