Despite its small size, Mars seems to have a huge impact on the orbital cycles that govern Earth’s climate, especially those ...

Astronomers are testing a quieter way of searching for moons beyond the solar system, using careful measurements of motion ...

There’s no mistaking Jupiter in the sky these winter evenings, rising in the southeast as evening twilight ends. In fact, you should be able to easily see it long before twilight fades. Jupiter is ...

A new discovery suggests the possibility of an exomoon with an unprecedentedly large mass, thousands of times larger than any ...

There’s no mistaking Jupiter in the sky these Butler winter evenings, rising in the southeast as evening twilight ends. In fact, you should be able to easily see it long before twilight fades.

Polygon has rounded up the best icy sci-fi planets from our favorite video games, movies, television, and books ...

Skygazers who look up at the moon tonight may be able to spot Saturn below it. Here's when and how to spot the conjunction.

"Most excitingly, this new idea addresses one of the longstanding habitability problems on Europa and is a good sign for the ...

Research into Jupiter’s moons shows Io and Europa did not evolve apart but formed with opposite compositions from the beginning.

That would make it thousands of times more massive than any moon orbiting a solar system plane  — so massive it could make ...

While Io, the most volcanically active moon in the solar system, appears completely dry and devoid of water ice, its neighbor ...