How frequently does a traveler from another star system sweep through our galactic neighborhood, and astronomers rush to the telescope? Not until recently was the answer: hardly ever. In fewer than ...

Astronomers have announced the discovery of A11pl3Z, a massive new interstellar object entering our solar system.

Comet or asteroid heading for the Sun is only the third time an interstellar object has been spotted inside our group of ...

Close stellar encounters could change the structure of our planetary system, potentially dooming Earth or other worlds to ...

The dwarf planet's existence also opens the likelihood of many more like it in our solar system waiting to be found ... has enough mass and gravity to be mostly round, but unlike other planets, has ...

For the dwarf planet candidate, one trip around the sun takes over 24,000 years. Its orbit challenges a proposed path for a hypothetical Planet Nine.

Since its debut in 2021, the James Webb Space Telescope has dazzled viewers with its infrared images of galaxies, nebulae, ...

Our solar system is a pretty wild place, full of amazing stuff. From the giant Sun to the tiny rocks floating around, there’s ...

Artist's impression of Planet Nine – a suspected “wide-orbit” planet – with the Sun in the distance; Neptune's orbit is shown ...

Stars passing close to the sun could cause planets to collide, including with Earth, or even be ejected as rogue planets, new ...

Solar flares can reshape exoplanet atmospheres within days, affecting temperature, winds, and potential habitability.

The Vera C. Rubin Observatory is poised to discover billions of new astronomical objects, revolutionizing understanding of ...