If you examine our solar system’s giant planets, you’ll notice right away that they’ve all got moons—a lot of moons. While ...

NASA scientists believe they have found indirect evidence of a moon orbiting an exoplanet with similarities to Jupiter's moon Io, pictured here. Credit: NASA / JPL-Caltech / SwRI / MSSS Scientists ...

Our solar system hosts almost 900 known moons; more than 400 orbit the eight planets while the remaining orbit dwarf planets, ...

For the first time, astronomers have discovered what could be an exomoon, a moon outside our solar system. The so-called exomoon, which is estimated to be the size of Neptune, was found in orbit ...

Scientists have spotted a few thousand exoplanets, or planets orbiting stars other than our sun. Exomoons are another story. There have been some potential exomoons, but nothing definitive. Now, a ...

A new study published as a pre-peer-reviewed paper on arXiv and accepted for publication in Astronomy & Astrophysics suggests that a massive gas giant, HD 206893 B, located 133 light-years from Earth, ...

Astronomers have so far identified over 1,800 exoplanets orbiting other stars. And the Kepler space telescope (Opens in a new window)has identified several thousand more possibilities, some of which ...