Planets / Oddities

Venus Spins So Slowly That Its Calendar Makes No Sense

2026-08-16
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What if midnight lasted longer than your whole year?

On Venus, that's not a riddle — it's just Tuesday. The planet rotates so sluggishly that a single day there, pole to pole, takes about 243 Earth days to complete. Its year, one full lap around the Sun, is only about 225 Earth days. The day genuinely outlasts the year. Wrap your head around that calendar. And the weirdness doesn't stop there. Venus spins backwards relative to most planets in the solar system, so the Sun doesn't rise in the east — it drags itself up in the west and crawls across the sky. Meanwhile, the atmosphere sits on top of all this like a crushing blanket, pushing surface temperatures to around 465 °C — hotter than Mercury, despite being further from the Sun. Venus rewards nobody who visits. Follow Deep Field Vault for more of the universe, one wrong planet at a time.

One Venusian Day

  • ~243 Earth days
  • longer than its own year

One Venusian Year

  • ~225 Earth days
  • shorter than its day

Sunrise? Wrong Way

  • Venus spins backwards
  • Sun rises in the WEST

Surface Temp

  • ~465 °C
  • hotter than Mercury
Imagery: NASA (public domain) · View original on NASA ↗
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