With sapphire waterfalls, lava rain and orbits around dead stars, these distant worlds push the limits of what’s possible.

Across the Milky Way and beyond, planetary systems appear to fall into a few recurring blueprints, and recent exoplanet ...

A newly discovered exoplanet is rewriting the rules of what planets can be. Orbiting a city-sized neutron star, this ...

But the Big Bang theory predicts that about 5% of the universe's contents should be atoms made of protons, neutrons and electrons. Most of those atoms cannot be found in stars and galaxies – a ...

When two giant planets collide, an even bigger world may be born. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Based on new simulations, ...

The search for an unknown planet in our solar system has inspired astronomers for more than a century. Now, a recent study suggests a potential new candidate, which the paper’s authors have dubbed ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. A new mission concept that would see a fleet of telescopes probing rocky planets in their stars' ...

Astronomers have discovered a huge planet with the fastest wind speeds ever observed in the universe. The gas giant WASP-127b, which is located over 500 light-years away from Earth, has winds that ...

Conditions in the early universe might have enabled rocky planets with water to form much earlier than anticipated, potentially allowing life to begin sooner too. Astrophysicists studying the early ...

There are a couple of ways that scientists can date planets, so which planets formed first in our solar system? When you purchase through links on our site, we may earn an affiliate commission. Here’s ...

When I was a kid, there were nine planets. Now we know of thousands! But that includes exoplanets, alien worlds that orbit alien suns. Only eight planets call our solar system home. Or there might ...