Our solar system is a smashing success. A new study suggests that from its earliest period—even before the last of its ...

While its star projector leaves a lot to be desired, the Science Can Solar System Planetary Projector is a fantastic educational tool for kids, with its solar system model, complete with talking ...

On August 24, 2006, our solar system lost a planet. It wasn't by cataclysmic destruction, but rather by the vote of the International Astronomical Union, which declared that Pluto, considered the ...

The methane gas may constitute a rarefied atmosphere, or it may come from erupting plumes on Makemake’s surface.

Is there a massive undiscovered planet on the outer reaches of the solar system? The idea has been around since before the discovery of Pluto in the 1930s. Labeled as planet X, prominent astronomers ...

An artist’s rendering of the IMAP spacecraft, which will explore and chart the boundaries of the ...

The early solar system is still a bit of a mystery to scientists, but the secret to learning Jupiter's origins might be ...

Need a refresher about 3I/ATLAS? Here's everything to know about the interstellar object, including when the latest observations will be made.