Astronauts orbiting Earth recently photographed not one but two comets while an aurora show danced below them. The ...

Our solar system might just be a tiny fragment of the gigantic universe, yet there remain so many elements that we are still discovering. Astronomers think they have come across something that has ...

A vast region of our solar system, called the Kuiper belt, stretches from the orbit of Neptune out to 50 or so astronomical ...

Astronomers might have found evidence of a structure located farbeyond Neptune, potentially giving us clues about the solar ...

"Similar to the asteroid belt, the Kuiper Belt is a region of leftovers from the solar system's early history. Like the ...

A newly discovered cluster of objects called the “inner kernel” of the Kuiper belt could teach us about the early history of ...

Nearly a century after Pluto’s discovery, astronomers are still searching for mysterious planets beyond Neptune - including a ...

Nearly a century after Pluto’s discovery, astronomers are still hunting for mysterious planets beyond Neptune - including a ...

In 2006, when Pluto was reclassified as a dwarf planet, Ceres, because of the new definition, was also classified as a dwarf planet. The asteroid designation of Ceres was not addressed and so it can ...

LONDON — The search for an unknown planet in our solar system has inspired astronomers for more than a century. Now, a recent study suggests a potential new candidate, which the paper's authors have ...