The planet Neptune shines a serene blue in this image assembled from two photos by NASA's Voyager 2 probe during its historic flyby of the planet in August 1989. Neptune reaches an orbital milestone ...

The disappearance of the gas giant's clouds is tied to the sun's 11-year cycle. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. All of Neptune's ...

A new computational model suggests that Uranus' and Neptune's cores may be less icy than their "ice giant" nickname suggests.

Because Uranus and Neptune are so far away, scientists only have educated guesses about the combination of ices and gases that make up these ice giants. While the general understanding is that these ...

Wind, rain or nor’easters, the Virginia Beach Neptune Festival has taken its fair share of punches from the weather through the years. But the annual gathering has not only endured, it’s blossomed.

Armchair astronomers can enjoy a cosmic double play tonight (Aug. 29), with back-to-back webcasts featuring faraway Neptune and a close-flying asteroid. The action starts at 8 p.m. EDT (midnight GMT ...