It's been one Neptunian year—or about 165 Earth years—since astronomers first observed the most distant planet from the sun.

Neptune retrograde will occur from July 2 until Dec. 7. Read on for a deeper meaning behind the cosmic event NASA In astrology, the planet Neptune is said to oversee our dreams, creativity, illusions, ...

Humankind is seeing Neptune’s rings in a whole new light thanks to the James Webb Space Telescope. In an infrared image released September 21, Neptune and its gossamer diadems of dust take on an ...

Neptune’s clouds have disappeared. Since the first detailed images of the planet were taken by the Voyager 2 spacecraft in 1989, its cerulean disc has been criss-crossed by wispy white clouds, but its ...

In pictures of the farthest planets from the sun, Uranus looks like a pale-green orb, while Neptune usually looks much bluer. A new analysis revealed their true colors. Here's NPR's Nell ...

Editor’s note: Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Space-based observatories such as the ...

Neptune receives a tiny fraction of the sunlight that strikes Earth, yet somehow, that’s enough to transform the clouds of this faraway world. The main driver of cloud formation is generally the ...