The potential discovery of a large planet beyond Neptune’s orbit could change everything we know about the Solar System.

Planet X, also called Planet Nine, is a hypothetical planetary body seven times the mass of Earth lurking behind Pluto. If ...

The universe, the cosmos, the entire solar system—it’s a never-ending playground for humanity’s curiosity. But what if there’s more to uncover? What if a new planet is lurking in the far reaches of ...

The European Space Agency (ESA) and Japan Aerospace Exploration Agency (JAXA) launched the joint Mercury mission in 2018. The ...

Imagine setting off on a road trip that doesn’t just take you through charming towns, but through an entire solar system – ...

"What If is an epic exploration of possibilities. What If is a Webby Award-winning science web series that takes you on a ...

The newcomer replacing Pluto presently goes by “Planet Nine.” If and when it finally shows up, it will get the honor of a ...

You're going to want to look up -- this event includes the three furthest planets in our solar system. 2025 is starting off ...

The close-up images reveal craters, the floors of which are in permanent shadow, and vast sunlit northern plains.

A very rare treat is about to grace Earth's night skies.

Dec. 19, 2024 — Scientists have unveiled groundbreaking research on the origins of lunar water, offering insights that could reshape our understanding of the Earth-Moon system and the broader ...