Two massive planets may have once existed in early solar system before being ejected, leaving behind evidence in unusual ...

The outer solar system once seemed like a quiet backwater. But a glut of tiny, strange moons with unruly orbits are coming into view, revealing hints of a surprising past – and the origin of Saturn's ...

The orbits of our planets and their moons indicate that planets might be missing from our solar system. According to more ...

While life on Mars (and Venus) has long been an obsession for those wondering if we're alone, there are other places in our ...

From the cratered companion that lights Earth's night sky to the hundreds of icy worlds circling the Solar System's giant ...

Add Yahoo as a preferred source to see more of our stories on Google. When you buy through links on our articles, Future and its syndication partners may earn a commission. Jupiter's moon and our ...

Moons may seem like quiet companions to the planets, but many of them are worlds every bit as fascinating as the planets themselves. Some are covered in oceans, some erupt with lava, and others hide ...

The outer planets of the solar system are swarmed by ice-wrapped moons. Some of these, such as Saturn's moon Enceladus, are known to have oceans of liquid water between the ice shell and the rocky ...

Far from the Sun’s heat, orbiting the outer planets of the solar system, are moons with oceans of liquid water beneath their frozen surfaces. Keith Cooper finds out how planetary scientists are ...

Could you imagine a moonless Jupiter? Well, that almost happened. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. For years, astronomers have ...