Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. The ice giant’s ...

Neptune’s mid-latitude clouds began fading in 2019 and have not recovered, according to nearly three decades of observations from the Hubble Space Telescope and ground-based observatories. By 2020, ...

Weather forecast for Neptune: After sunny weather for the past few Earth years, we’ll see increasingly more clouds over the next few years. In 1989, NASA’s Voyager 2 spacecraft provided the first ...

The James Webb Space Telescope has made the first direct analysis of clouds on a nearby alien world. These aren’t just made of water vapor but also sand, which would move around the planet much like ...

It has been a mystery for astronomers how certain dying stars have their colossal quantities of material blown out into the universe and shrink into objects called “white dwarves”. This is the basis ...

(CNN) — Astronomers have been puzzling over a mystery on Neptune, and now they think they have unlocked its secret. The ice giant’s ghostly, cirrus-like clouds largely disappeared four years ago.

Astronomers have uncovered a link between Neptune's shifting cloud abundance and the 11-year solar cycle, in which the waxing and waning of the Sun's entangled magnetic fields drives solar activity.