The solar system has many more moons than the one we can see in the sky. But how many do we actually know about? And how many ...

Mars is the fourth planet from the sun and has a distinct rusty red appearance and two unusual moons. The Red Planet is a ...

The outermost of Jupiter’s four giant Galilean satellites, Callisto is a fascinating world of ice, rock and mystery. Discovered by Galileo Galilei in 1610, this massive moon holds the title of the ...

In the far reaches of the solar system, the planetary neighbourhood seems quiet. Beyond Jupiter, the sun is no longer a blazing disc, but a cold, white lamp. The planets are separated by gulfs of ...

We have an idea of what the solar system's past was like: It was violent and chaotic. However, we are still studying how violent it was. Current models suggest that at some point after their formation ...

OK, WHAT I’m about to say may cause some distress. You remember how it was with Pluto? In 2006, the International Astronomical Union (IAU) voted to downgrade the much-loved ninth planet to a mere ...

Nereid, Neptune’s third-largest moon, could be the only intact survivor from an ancient set of moons destroyed early in the solar system’s history, according to a new analysis based on data from the ...