February 16, 2012

Why Is Venus Spinning So Slowly?

Jason Major, National Geographic


ESA

Planet lovers take note: Venus is spinning even slower than astronomers thought, according to new data from a European space probe.

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.

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TAGGED: Venus