After decades of searching, astronomers may have finally stumbled upon the first moon known to exist beyond our solar ...

Earth may have a moon today because a nearby neighbor once crashed into us, a new analysis of Apollo samples and terrestrial ...

Astronomers found signs that mysterious interstellar object 3I/ATLAS is radiating a "heartbeat" pulse of light that repeats ...

Using the Webb telescope’s powerful Near Infrared Imager and Slitless Spectrograph (NIRISS) instrument, the team detected a ...

What can star variability—changes in a star's brightness over time—teach astronomers about exoplanet habitability? This is ...

Radiation from space that led to more than 6,000 Airbus aircraft needing emergency computer updates could become a growing ...

From more than 2 billion miles away, a spacecraft built to study Jupiter’s icy moon Europa has managed to snap a crisp, ...

Which planet is the furthest from the sun? Some may think it’s Pluto, but it’s actually Neptune. Learn more about this ice giant and how it can help us understand more about planets in our Solar ...

Welcome to your December horoscope! It’s hard to believe that we’ve made it to the end of 2025. In some ways, the year ends like it began with the generational outer planets Saturn, Uranus, Neptune ...

When astronomers search for planets that could host liquid water on their surface, they start by looking at a star's habitable zone. Water is a key ingredient for life, and on a planet too close to ...

Small icy moons may have hidden oceans that briefly boil under thick ice. Changing pressure inside these moons shapes their ...

Far beyond Neptune, at the far outer rim of our Solar System, astronomers have spotted what looks like a hidden “structure” ...