Neptune is the fourth largest planet in the solar system, with a radius of 15,599.4 miles (24,622 kilometers) — the distance between its core and the surface.

The ice-giant Neptune, the most distant and third largest planet in our solar system, is a distinctive dark blue ball of gas, which may appear calm but is actually throttled by a chaotic atmosphere.

About four years ago, Neptune’s ghostly, cirrus-like clouds largely disappeared, and only a patch of clouds hovering over the ice giant’s south pole exists today.Using almost 30 years worth of ...

Webb’s detection of auroras on Neptune is the first time astronomers have captured direct evidence of this phenomenon on the planet. NASA, ESA, CSA, STScI, Heidi Hammel (AURA), Henrik Melin ...

Now nearing a close conjunction, Saturn and Neptune sit just to the right of the crescent Moon in the morning sky.

Science | November 5, 2024. The Six Most Amazing Discoveries We’ve Made About Neptune. Despite the lack of a dedicated mission to the planet, scientists have learned plenty through ground ...

After 34 years of searching, astronomers have finally confirmed Neptune has auroras, thanks to data from the James Webb Space Telescope ...

Voyager 2 also took Neptune's upper atmosphere temperature. Webb scientists were surprised to learn that the planet has cooled over the past 34 years by hundreds of degrees. It's now about half as ...