The solar system is composed of the sun, eight major planets, five dwarf planets, over a hundred moons, and countless comets ...

The discovery of ancient water in a planet-forming disk reveals that some of the water found in comets—and maybe even ...

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 dubbed ...

More than 2 billion kilometers farther from the sun than Pluto, a frigid world named Makemake sports the most distant gas ever seen in our solar system, new observations reveal. “By surprise, we found ...