Most planetary systems contain worlds larger than Earth but smaller than Neptune, and the low-density planets around one ...

Astronomers are closing in on one of the most tantalizing possibilities in planetary science, evidence that a previously ...

Long before humans walked the Earth, your solar system had a brush with two blazing blue stars that passed surprisingly close ...

One of the biggest recent surprises in astronomy is the discovery that most stars like the Sun harbor a planet ...

Mercury has long baffled astronomers because it defies much of what we know about planet formation. A new space mission ...

Astronomers have detected a massive, lonely world drifting through the darkness without a star to call home. This ...

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

This is the strongest evidence yet of a rocky planet beyond our solar system with an atmosphere. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works.

Astronomers have confirmed the discovery of only the third known interstellar object everobserved passing through our Solar ...

Scientists using the James Webb telescope observed a distant exoplanet with an atmosphere of soot and diamonds, challenging ...

Space-based solar power could deliver clean electricity day and night, but launch costs, safety, and scale remain major ...

It was almost 100 years ago that Clyde W. Tombaugh discovered Pluto. That was the last planet found until 1992, when humans found another one. But this new planet wasn't in our solar system—it was ...