Astronomers have spotted new moons around Uranus and Neptune for the first time in a decade. These are the faintest moons ever spotted orbiting any planet, and they prove a long-standing idea ...

Data from the James Webb Space Telescope and advanced computer models have classified a type of planet unlike any in our ...

Learn what this survey recorded of exocomet belts, which imaged and identified bands of every size.

The newcomer replacing Pluto presently goes by “Planet Nine.” If and when it finally shows up, it will get the honor of a real name, but so far, the evidence for this hypothetical planet is all ...

An international team of astronomers has reported the detection of a new exoplanet orbiting a bright late F-type star. The ...

The potential discovery of a large planet beyond Neptune’s orbit could change everything we know about the Solar System.

Behind the planets in the solar system is the Kuiper Belt. An inventory of similar structures around other stars shows how unusual it is.

“Because Pluto is rotating rapidly prior to the collision, and because Charon lies mostly outside of their corotation zone, ...