I/ATLAS is a natural celestial object with all the qualities typical to a comet. It doesn't just belong to our solar system.

Harvard's Avi Loeb reveals why interstellar visitor 3I/ATLAS could be an alien 'Trojan Horse' by design rather than a natural ...

With 3I/ATLAS streaking away from our planet, speculation remains as to whether the interstellar comet is alien or not.

Grab-and-go missions to asteroids have provided some of the most scientifically valuable samples since the Apollo ...

Physicists discovered that the famous ‘Star Trek’ spaceship got a lot right about designing a ship to jump from galaxy to ...

The sun’s outer atmosphere resembles a pufferfish.

An exosyzygy – an alignment of three celestial objects around another star – is predicted to happen later this year, but it ...

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

China has completed the first flight of its Jiutian unmanned "mothership," a large drone designed to deploy dozens of smaller ...

Earth reaches its closest point to the sun in its 2026 orbit on Jan. 3. The sun will appear larger in the sky than on any ...

Rogue planets — worlds that drift through space alone without a star — largely remain a mystery to scientists. Now, ...

JWST observations of the ultra-hot super-Earth exoplanet TOI-561 b provide the strongest evidence to date for an atmosphere surrounding a rocky planet beyond our Solar System.