"Rings are mostly made of ice and small rocks," said William Saunders, a planetary scientist at NASA's Langley Research ...

The solar system consists of our star, the sun, and everything bound to it by gravity: the planets Mercury, Venus, Earth, ...

Earth has four seasons, but do other planets in our solar system also have hot summer days and cold winter nights?

Discovered in 1930, Pluto was long considered our Solar System's ninth planet, but was unseated in 2006 after the discovery ...

Our solar system may have a ninth planet after all, following the declassification of Pluto nearly two decades ago, ...

For months, President Trump has taunted Canada by claiming it should become America's 51st state. But the country's new prime ...

So which planets in our solar system have rings? All four giant planets — Jupiter, Saturn, Uranus and Neptune — sport these ...

The solar system is our cosmic neighborhood, made up of the sun and everything that orbits it — planets, moons, asteroids ... At the center is the sun, a yellow dwarf star that contains 99.8 ...

But do other planets have seasonal patterns, too? Indeed, other planets, dwarf planets and moons in our solar system do have seasonal cycles — and they can look wildly different from the ones we ...

Article continues below The solar system consists of the Sun ... and Neptune, along with dwarf planets like Pluto, moons, and millions of asteroids. The hypothetical Planet Nine is said to ...

Pluto was reclassified as a dwarf planet in 2006. Our solar system may have a ninth planet after all, researchers say. The possibility that an additional planet may be hidden far into the solar ...

An international team used 40 years' worth of data from two space probes to track down what they believe are signs of this ...