When looking at our solar system, the planets going around the sun seem to be set up in a pretty organized fashion. They are all orbiting in the same direction, and exist on a roughly flat planetary ...

Currently presenting a faint magnitude of 14.7, Comet 3I/ATLAS is so distant that its light requires nearly 19 minutes to reach Earth.

Scientists have identified three Earth-sized planets orbiting two stars in the TOI-2267 system. Remarkably, planets transit ...

Astrophotographer Josh Dury captured this stunning photograph of the seven-planet alignment on Feb. 22 from the Mendip Hills, Somerset, U.K. "A fantastic, yet challenging photographic opportunity to ...

As telescopes have become more powerful, it’s turned out our solar system is not the only game in town: There are millions of ...

Three astronomers last week proposed expanding the official definition of a planet to encompass worlds orbiting stars other than our own, a nuance not currently included in the formal definition of ...

The official definition of a “planet” could be set to change again soon. Last time that happened, Pluto was kicked out of the club, but the new proposed definition is designed to be more inclusive.

Only 3 million years old, the huge planet is considered a "baby" in space, NASA said. In fact, researchers said it is the equivalent in age to a two-week-old baby. In comparison, Earth, a middle-aged ...