Figuring out the day length of Earth is more complicated than you might imagine. While on average a day is 24 hours long, throughout the year the planet's rotation can speed up and slow down, with one ...

This Jan. 2, 2010 image made available by NASA shows the planet Saturn, as seen from the Cassini spacecraft. On Monday, new research suggested that Saturn’s rings may be older than they look ...

A dwarf planet called 50000 Quaoar that orbits beyond Neptune appears to have a ring that shouldn't be there, at 7.4 times more distant than the planet's radius.

Saturn is, of course, famous for its rings, but in our solar system there are actually four planets with ring systems of one size or another. Every gas giant in our solar system has a ring -- that ...

Just on the outskirts of our solar system exists the dwarf planet Quaoar, and recent observations of the planet found a dense ring around it, but scientists can't figure how – or why – it's there.

A newly discovered exoplanet contains 37 rings nearly 200 times larger than Saturn's ring system. To boot, a large gap in the rings suggests the presence of at least one Earth- or Mars-size exomoon.

What are the rings around planets made of? — Vihan, aged five, Chennai, India. You may like James Webb Space Telescope sees 1st exoplanet raining sand alongside 'sandcastle' partner world ...

Convulsions in the planet’s interior are picked up in the region known as the C ring, and help scientists understand what lies within. By Robin George Andrews Saturn’s icy rings are not just ...

The rings around the giant planets of the solar system — Jupiter, Saturn, Uranus and Neptune — generally fit within the constraints of the Roche limit.

Scientists say that Saturn's rings are falling in on the planet as icy rain due to the gas giant's intense gravity. Saturn's rings are made of pieces of comets, asteroids or moons.

But unlike Saturn, this ringed planet is a real bruiser. Its rings are massive and opaque enough to occasionally block out the star's light. "This planet is much larger than Jupiter or Saturn, ...

That’s how many kilometers Quaoar’s rings are from the dwarf planet’s core. That puts its rings at a distance of roughly 7.4 of the dwarf planet’s radii from its core—twice as far as the ...