From the cratered companion that lights Earth's night sky to the hundreds of icy worlds circling the Solar System's giant planets, moons are among the most fascinating objects in space. Over the past ...

What if Jupiter’s 79 moons weren’t gravitationally bound to Jupiter? What if they became rogue objects orbiting on their own ...

Jupiter’s icy moons may have been seeded with the chemical ingredients for life from the very beginning. An international team of scientists modeled how complex organic molecules—essential building ...

Young Jupiter’s powerful magnetic field may have created a safe zone where several large moons could survive. Saturn lacked this protection, possibly explaining why Titan stands almost alone among its ...