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 ...

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 ...

Carl Grillmair, a renowned Caltech scientist who discovered water on a distant planet, was fatally shot at his Los Angeles-area home. Authorities arrested a suspect in connection with the killing.

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

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

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

The outer solar system begins where sunlight fades and distances stretch beyond everyday comprehension. This journey traces ...

While all among us will be under the influence of this transit, three signs in particular will feel the firepower most ...

"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 ...

Astronomers have puzzled for years over a strange pattern in the outer solar system. A surprising number of icy bodies far beyond Neptune resemble snowmen, made of two rounded lobes stuck together.