While the James Webb Space Telescope looks for the most distant galaxies ever seen, astronomers have discovered something new ...

Take a peek at the early-morning duo of Saturn and Neptune, rising together in Pisces around 2:30 A.M. local daylight time.

The object is about 700 kilometres wide and lies nearly three times farther from Earth than Neptune. Its highly elongated ...

U.S. astronomers hunting for "Planet Nine" have instead stumbled on what appears to be a new dwarf planet in the solar system's outer reaches.

The small world was found during a search for the hypothetical Planet Nine, and astronomers say the next time it will reach ...

It's an evocative idea that has long bedeviled scientists: a huge and mysterious planet is lurking in the darkness at the ...

Astronomers find evidence of a possible ninth planet beyond Neptune, reigniting the debate about the formation of the Solar ...

There’s a new object in the distant reaches of our solar system, and it might just offer clues to a long-standing cosmic ...

The moon will rise with Venus and the ice giant Neptune in the pre-dawn sky on Thursday, May 22.

A team of astronomers believe they may have discovered a new dwarf planet—just like Pluto—on the edge of our solar system.