A long-lost moon could explain why Mars is so different from the other rocky planets in the solar system.Today, Mars has two ...

Previously, astronomers suspected that the planet’s 26.7-degree tilt came from gravitational interactions with its neighbor Neptune, but according to the study, the lost moon theory may provide ...

But the researchers say the lost moon theory isn’t just a possibility for the origin of Saturn’s rings. It could also shed some light on two other puzzling features: ...

This lost moon, the authors of the study say, is responsible for Saturn’s trademark feature: the rings. These astronomers didn’t set out to find a missing moon.

Today, Mars has two tiny moons. But early in its history, the Red Planet may have had a much larger moon, which might be responsible for Mars' weird shape and extreme terrain, Michael Efroimsky ...

A long-lost moon could explain why Mars is so different from the other rocky planets in the solar system. Today, Mars has two tiny moons. But early in its history, the Red Planet may have had a ...