New spacecraft data from Pioneer, Voyager and Juno show that Jupiter is slightly smaller and more flattened than earlier estimates, refining the planet’s measured size and shape.

Saturn’s largest moon, Titan, may have been born in a colossal cosmic crash. New research suggests Titan formed when two older moons slammed together hundreds of millions of years ago—an event so ...

New research using the James Webb Space Telescope offers the most detailed portrait yet of how auroras form on Uranus.

If you think auroras on Earth are a strange and mesmerizing sight, that's nothing like what occurs on the perplexing world of ...