We used to think moons were the boring sidekicks of the solar system. For decades, we treated them like cosmic leftovers — cold, dead rocks that did nothing but tag along with their parent planets. We ...

Hundreds of Hidden Asteroid Moons Found in Our Solar System ...

Our moon is closer in size to Earth than any other moon in the solar system is to its associated planet, however it is far ...

A distant 'exomoon' the size of Jupiter is changing how we think about the cosmos.

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 ...

A Jupiter-mass object orbiting a brown dwarf could become the first confirmed moon beyond our Solar System.

From the sun and eight planets to mysterious detached objects, discover the latest developments, awe-inspiring features and ...

A solar eclipse is a rare, visually striking phenomenon. The Moon passes between Earth and the Sun, temporarily hiding our star – a geometrical alignment spanning millions of miles. A partial solar ...