A tiny frozen world in the outer Solar System has been found to have an atmosphere, making it only the second object beyond ...

If confirmed, the rock would become just the second world past Neptune in our solar system to host an atmosphere.

The first interstellar object to visit the solar system may have been a fragment of an icy exoplanet, research suggests. When 1I/'Oumuamua was first spotted in 2017, astronomers quickly determined ...

(CNN) — Astronomers have detected a thin atmosphere around a tiny celestial body in the outer solar system for the first time — an object previously thought to be too small to support the presence of ...

NASA's new chief wants to reinstate Pluto as a planet. And scientists are on board – as long as you're also okay with having ...

Is Pluto a planet? NASA Administrator Jared Isaacman told Congress on Tuesday that Pluto should be recognized as a planet, 20 years after its status changed.

There’s been a fierce debate over the past two decades about the status of the distant icy world of Pluto after it was contentiously stripped of its planethood and reclassified as a dwarf planet. Nasa ...