The mysterious Planet Nine may have up to 20 moons that could be superheated by the hypothetical planet's gravitational pull, making them easy to spot. When you purchase through links on our site ...

The calculations were produced by entering orbital data from hypothetical moons of the planet. As a result, the astronomers now have an explanation for the unusual orbits of 12 confirmed small ...

You're familiar with moons. But what do you get when you cross the two? "Ploonets," according to astronomers from Australia and Colombia. These weird, hypothetical objects start life as a moon ...

If the exomoon candidate orbiting Kepler-1625b truly exists, it is much more massive than the moons observed in the ... results of climate modelling of a hypothetical moon-moon in the Kepler ...