The deep interiors of ice giants such as Uranus and Neptune may contain a previously unknown form of matter, based on new computational research by Carnegie scientists Cong Liu and Ronald Cohen.

Jupiter and Saturn are the two largest planets in our solar system, and both are surrounded by dozens—even hundreds—of moons.

The two largest planets in our solar system, Jupiter and Saturn, also have the largest satellite systems, or the most moons.

Neptune is the solar system's most distant planet, a cold, blue ice giant sitting nearly 30 times further from the sun than Earth. At that remote distance, temperatures plunge to nearly minus 200 ...

A new study published in The Astronomical Journal has revealed an astonishing possibility: free-floating planets, long considered cosmic castaways, may not be as solitary as once thought. Using the ...

Scientists propose that life-sustaining environments may exist on moons orbiting free-floating planets drifting through interstellar space.

What is the difference between a moon and a planet? Trick question! According to scientific definitions, there often isn’t much of a difference at all. That might seem counterintuitive, but it’s true.

When the Sun runs out of hydrogen fuel and expands into a red giant, it will eventually encompass the innermost planets of the solar system, out to about Earth’s orbit. Being closer to our enlarged ...

If NASA’s ambitious lunar exploration plans succeed, scientists will cover the moon with sensors—and find answers to several ...

October 2025 promises an exciting month for skywatchers as multiple celestial events unfold across the globe. From bright moons to meteor showers and distant galaxies, the night sky offers a ...