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

Scientists have found that Uranus is emitting its own internal heat — even more than it receives from sunlight — and this discovery contradicts observations of the distant gas giant made by NASA's ...

Despite being one of the most promising places to explore for signs of life, "special regions" and "uncertain regions" may be ...

In the remote outer reaches of planetary systems, far beyond the orbit of known planets, enormous and mysterious worlds silently loop around their stars. Some drift as far as 10,000 times the distance ...

After studying thousands of computer simulations of the solar system, researchers at Rice University and the Planetary Science Institute think there’s a 40% chance an elusive “Planet Nine” or “Planet ...

Astronomers have discovered icy rocks in the outer solar system that seem to defy the laws of physics, suggesting the ...

"It represents a major step forward in how we think about the search for distant worlds capable of hosting life." Water isn't just delivered to planets by comets and asteroids — it can also be forged ...

The outer reaches of our Solar System continue to reveal a complex dynamical environment where the interplay of gravitational forces shapes the orbits of a myriad of distant bodies. Research in this ...

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

LONDON — 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 ...