The cold and remote planets originally earned their label of "ice giants" to contrast their interiors from those of Jupiter ...

In the first episode of "The Expanse" (which debuted 10 years ago this weekend), a spaceship makes the biggest meal of ...

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 ...

Saturn's moon Mimas, just 250 miles wide, could have a liquid water ocean under its outer icy shell, according to new research led by Max Rudolph at UC Davis. If such moons are the right size, water ...

If 2025 has felt like a chaotic year, there’s a reason. We’ve had no fewer than 12 planetary retrogrades — two more than in 2024 — and as we slide into the final stretch of the year, no less than five ...

Over the past century, astronomers have speculated about the existence of a mysterious 9th planet lurking in the outer ...

New models suggest Uranus and Neptune may hold far more rock than expected, raising questions about how these distant planets formed.

Astronomers have produced the first continuous, two-dimensional maps of the outer edge of the sun's atmosphere, a shifting, ...

Learn what the first maps of the sun's atmospheric boundary reveal about solar wind and its escape into space.

Windswept isolation, inhospitality to humans, and piracy have historically kept this place one of the planet's truly wild and ...

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 ...

A new study has found that Earth's innermost core isn't a conventional solid, but rather in a 'superionic state'.