Venus' stormy atmosphere acts like a brake ... The gravity of the larger body keeps the rotational period of the smaller body in sync with its orbit around the larger body. That means the smaller ...

Venus is often called Earth's "Sister Planet ... less than 3° compared to Earth's 23.5° – and its very slow rotational period (the planet takes around 243 days to complete a single rotation ...

Using these parameters we find that such a world could have had moderate temperatures if Venus had a rotation period slower than about 16 Earth days, despite an incident solar flux 46-70% higher ...

If Venus was once as watery as Earth ... In the most extreme cases, that tidal force could have slowed down the rotational period by as much as 72 Earth days per million years.

As Venus travels around the sun within the orbit of Earth, it changes between a 'morning star' and an 'evening star' roughly every nine-and-a-half months. During this period it shifts between ...

Venus' accepted rate of rotation was established by NASA's Magellan mission in the 1990s, when a day on Venus (or one rotation) was clocked at being equal in duration to 243.0185 Earth days. Slow ...

Venus is the closest planet to Earth, so astronomers have had plenty of time to study its behavior. When measuring its rate of rotation, researchers have long been puzzled by readings that simply ...

But scientists are still puzzled by Venus's retrograde, or backward, rotation. Now a team of scientists from the French research institute Astronomie et Systemes Dynamiques have proposed a new ...