Evidence that rocky planets beyond Jupiter formed as rapidly, and at the same time, as the inner planets could transform our ...

A large lunar crater featured in the iconic 'Earthrise' photo has just helped the European JUICE spacecraft hone its alien-hunting instruments during a once-in-a-lifetime flyby.

Is there a massive undiscovered planet on the outer reaches of the Solar System? The idea has been around since before the ...

The celestial body's unusual orbit “implies that something extraordinary occurred" in the early days of the solar system—and ...

The astronomers observed hot minerals just beginning to solidify – the first specks of planet-forming material, the ...

Harvard astrophysicist Avi Loeb has cowritten a research paper speculating whether the comet 3I/ATLAS is in fact "hostile" ...

From Mercury to Pluto (and maybe even Planet Nine), here are some of 2023's most intriguing discoveries about the planets, moons and other bodies in our solar system.

Nasa's powerful James Webb Space Telescope is showing us something humankind has never witnessed firsthand before: The birth ...

Learn about cryovolcanism, which shapes the surface of icy moons in the outer Solar System by releasing water that ...

A newly discovered dwarf planet called 'Ammonite' (2023 KQ14) has been spotted in the outer solar system, and it could be ...

Scientists have been able to recreate the extreme conditions found on icy moons in deep space—and revealed the unstable ...