How many planets are there in our solar system? Nine? Eight? Twelve? Hundreds? I know many will insist there are nine, with Pluto as the ninth planet, but ...

After a decade-long search, some scientists say a growing number of clues point to the existence of a hidden planet in the ...

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Samples collected from the near-Earth asteroid Ryugu have revealed clues about a primordial magnetic field that helped ...

The roughly six-hour flyby in 1986 revealed Uranus' protective magnetic field was strangely empty. Now, researchers say that ...

A solar wind event squashed the protective bubble around Uranus just before Voyager 2 flew by the planet in 1986, shifting ...

The 7 fastest planets in the solar system, ranked by their orbital speeds around the Sun, are as follows: Mercury is the fastest planet in our solar system, orbiting the sun at an average speed of 47.

Earth, between sweltering Venus and frozen Mars, formed and orbits within a band where water could persist in solid, liquid, and gaseous phases. Mars had surface water, but not as much as Earth, and ...

Voyager 2's visit to Uranus may have left us with the complete wrong impression of the ice giant for nearly 40 years, ...

Some minerals in lava could suggest water is nearby.

This frigid planet, our solar system's third largest, remains a bit of an enigma 243 years later. And some of what we thought we knew about it turns out to be off the mark. Much of the knowledge ...

Samples collected from the near-Earth asteroid Ryugu have revealed clues about a primordial magnetic field that helped asteroids, planets and moons grow in our solar system. Analysis of three ...