Sedna will make its closest approach to the Sun in 2076, giving us a rare opportunity to visit the planetoid before it drifts ...

In the frozen outskirts of the solar system, a reddish dwarf planet orbits in silence. Known as Sedna, it is so distant that ...

In the outer reaches of our solar system, far beyond the orbit of Pluto, lies Sedna, one of the most mysterious objects ever ...

JWST has confirmed Pluto’s bizarre atmospheric behavior and its ghostly interaction with Charon. These findings could reshape our understanding of distant icy worlds—and even hint at how Earth once ...

Previously, hints of auroral activity on Neptune were detected during NASA's Voyager 2 flyby in 1989, but confirming and imaging the phenomena had not been achieved until now.

Astronomers first suspected auroral activity when NASA’s Voyager 2 flyby in 1989. However, no telescope had ever directly imaged the phenomenon. With auroras already confirmed on Jupiter, Saturn ...

Faint hints of Neptune’s auroras were first detected during Voyager 2’s flyby of the planet, but Webb’s latest discovery is the first direct evidence of the phenomenon.

Scientists also measured Neptune’s temperature for the first time since the Voyager 2 flyby in 1989. They found that its upper atmosphere has cooled by hundreds of degrees Celsius.

At the left, an enhanced-color image of Neptune from NASA’s Hubble Space Telescope. At the right, that image is combined with data from NASA’s James Webb Space Telescope to show auroras ...

From the Webb observations, the team also measured the temperature of the top of Neptune's atmosphere for the first time since Voyager 2's flyby. The results hint at why Neptune's auroras remained ...