It's been one Neptunian year—or about 165 Earth years—since astronomers first observed the most distant planet from the sun.

New images released Wednesday from NASA's James Webb Space Telescope are revealing Neptune, and the planet's hard-to-detect rings, in a fresh light. "It has been three decades since we last saw these ...

Hubble Space Telescope imagery Neptune has revealed that the planet's clouds are disappearing. Credit: NASA Goddard Space ...

Water isn't just delivered to planets by comets and asteroids — it can also be forged as worlds form, a new study finds.