Having obtained near infrared data from wavelengths not touched by Voyager and Hubble, researchers in the United States, United Kingdom, and Japan combed those observations for triatomic hydrogen ions,

Scientists suspected the ice giant hosted auroras—and had already observed them on Jupiter, Saturn and Uranus. But an observation of Neptune's lights remained elusive for decades

Using Webb’s near-infrared spectrograph, astronomers have captured new images of Neptune that finally reveal the planet’s mysterious auroral activity. 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.