Have astronomers observed the first exomoon, or have they spotted a weird object that could challenge the very concept of ...

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

The issue is that they're small. Our Moon is quite small compared to Earth, but the largest satellite of Mars, is just 7 ...

The newly found object, estimated to be roughly as massive as Jupiter, orbits a brown dwarf—a "failed star"—which in turn ...

Astronomers detected a strong 170-day signal suggesting a Jupiter-mass object orbits the brown dwarf CD-35 2722 B. The ...

Observations made with the European Southern Observatory’s Very Large Telescope (ESO’s VLT) have revealed evidence for a moon ...

This video explores the key characteristics of each planet within our solar system. Suitable for teaching science at KS1 and ...

So far, humanity has yet to find its first "exomoon"—a moon orbiting a planet outside of the solar system. But that hasn't been for lack of trying. According to a new paper by Thomas Winterhalder of ...

Add Yahoo as a preferred source to see more of our stories on Google. (Ianm35/iStock/Getty Images Plus) The Solar System is one of the comforting constants of human existence. No matter what else we ...

Young Jupiter’s powerful magnetic field may have created a safe zone where several large moons could survive. Saturn lacked ...

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

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 ...