The sun’s outer atmosphere resembles a pufferfish.

The small, icy visitor now racing away from the inner solar system is not just another comet. It is an interstellar object, ...

Not all planets are lucky enough to live in a neighborhood like our Solar System – some are doomed to roam the cosmos alone.

A lucky alignment of space- and ground-based telescopes has enabled researchers to nail down the mass of a rogue planet for the first time. Unlike worlds in our Solar System, rogue planets do not ...

The interstellar visitor traces back to the Milky Way's violent heart. Discover the secrets of its 130,000mph galactic ...

Could the icy moons of our solar system hold life beyond our planet? Keith Cooper looks at how planetary scientists plan to ...

The newly identified cluster of Kuiper Belt objects lies about 4 billion miles from the Sun, offering fresh clues about how ...

Leaving the solar system behind, this video dives into the staggering distances between stars, galaxies, clusters, and ...

A Carnegie-led team of astronomers detected the strongest evidence yet of an atmosphere around a rocky planet beyond our ...

Mercury has long baffled astronomers because it defies much of what we know about planet formation. A new space mission ...

Kuiper Belt clues, competing ideas, and how Rubin Observatory could finally reveal the hidden world soon by 2026.

Comet 3I/ATLAS is a rare visitor passing briefly through our solar system. Here’s how to find it in the night sky—and what you’ll need to catch a glimpse.