For the first time, astronomers have mapped the vertical structure of Uranus’ ionosphere, uncovering unexpected temperature peaks, weakened ion densities, and puzzling dark regions shaped by the ...

An international team of astronomers has discovered a distant planetary system that challenges long-standing theories of how ...

Six planets will align in February as part of a rare planetary parade. Find out how and when you can see the event.

An astrophysicist who discovered water on another planet beyond our solar system was fatally shot outside his home this week. 67-year-old Carl Grillmair had worked with Caltech’s Infrared Processing ...

Interstellar object 3I/ATLAS appears to have started spewing huge amounts of water and other organics into space.

The observations provide the most detailed picture yet of where Uranus' auroras form and how energy moves through its atmosphere.

Far beyond Neptune, at the cold edge of our solar system, millions of icy objects drift quietly in a region called the Kuiper ...

The James Webb Space Telescope has produced the first-ever three-dimensional images of Uranus’s upper atmosphere, revealing a chaotic and shimmering world of infrared auroras.

"Uranus's magnetosphere is one of the strangest in the solar system," Paola Tiranti, a researcher at Northumbria University in the U.K., said in a statement. "It's tilted and offset from the planet's ...

Of the eight known planets in the Solar System, Mercury is the smallest and closest to our star, the Sun. Mercury has been known since the time of ancient Babylon, in the 14th century BC. Its name ...

Out in the Kuiper Belt, the massive doughnut of debris beyond Neptune, about one in 10 kilometer-scale objects have surprised scientists with their unexpected shape. Rather than resembling a ball, ...