The thicknesses of ice shells covering our solar system's ocean-bearing moons could provide hints about whether these mysterious bodies may harbor life.

Just the third-ever confirmed interstellar object has been detected in our solar system. Here's what we know. (Spoiler: It's ...

Our Solar System’s moons and planets have water—in the form of ice, vapor, and even oceans. Scientists are finding more evidence of water outside of Earth.

WSJ’s Danny Lewis speaks to University of Arizona astronomer Chris Impey about what makes a planet habitable and how learning about exoplanets can teach us more about our own world.

The newly discovered moons give Jupiter a total of 92 moons, now more than Saturn and the most of any planet in our solar system.

When the Sun runs out of hydrogen fuel and expands into a red giant, it will eventually encompass the innermost planets of the solar system, out to about Earth's orbit. Being closer to our ...

Mars might become more temperate and hospitable to life. In addition, it could well be a boon for the gas giant Jupiter and its moons. That's because the habitable zone of the solar system will ...

The solar system has many more moons than the one we can see in the sky. But how many do we actually know about? And how many more are waiting to be discovered?

Nasa’s Europa Clipper spacecraft will loop around Jupiter on a course that will carry it by Europa 49 times over four years ...

The European Space Agency's Jupiter Icy Moons Explorer (JUICE) probe has spotted a habitable planet right here in our solar system — and its sensors are showing several molecules and elements in ...

The Sun's expansion into a red giant will engulf the inner planets, drastically increasing temperatures in the outer solar system. The habitable zone will expand to 10-50 AU, potentially making ...

In particular, white dwarf planetary systems offer an interesting population of potentially habitable planets (and moons) that can be studied by our current (and upcoming) space-based observatories.