How do you explore the interior of a planet without ever touching down on it? Start by watching the way the planet spins, then measure how your spacecraft orbits it — very, very carefully. This is ...

Scientists may finally have an answer for why the ferocious jet streams on the solar system’s giant planets blow in opposite ...

Study discovered that Chiron, a small icy world between Saturn and Uranus, is forming rings. This shows how small worlds ...

Right now, we're zooming through space at incredible speeds, so why aren't we dizzy or flying off into space?  An expert ...

Astronomers have made the first measurement of spin-orbit alignment for a distant ‘super-Jupiter’ planet, demonstrating a technique that could enable breakthroughs in the quest to understand how ...

You're unlikely to miss the 1.25 milliseconds that will make Aug. 5 one of the shortest days ever. Earth's rotation is randomly speeding up, and nobody is quite sure why. These speedups, which have ...

Jupiter, the largest planet in the solar system, was 2 to 2.5 times bigger in its earlier life, according to new research. Jupiter, the largest planet orbiting the sun, used to be much bigger and ...

WASHINGTON (Reuters) - Are you the type of person who gets dizzy just watching a merry-go-round go round and round? If so, don't plan a visit to the planet known as Beta Pictoris b. The thing spins ...

A day on Venus is the equivalent in time as 243 Earth days. A year, on the other hand, equates to 225 days on Earth. “That means that a day on Venus is a little longer than a year on Venus,” wrote ...