Planet lovers take note: Venus is rotating 6.5 minutes slower than it did 16 yea...

Planet lovers take note: Venus is rotating 6.5 minutes slower than it did 16 years ago—and scientists are stumped.


Venus Spinning Even Slower Than Thought—Scientists Stumped
news.nationalgeographic.com
In the early 1990s scientists with NASA's Magellan mission calculated that a single rotation of Venus takes 243.015 Earth days, based on the speed of surface features passing beneath the orbiting spacecraft.

Source: National Geographic's Facebook Wall