The James Webb Space Telescope has achieved a groundbreaking astronomical milestone, capturing clear images of auroras o…

The James Webb Space Telescope has achieved a groundbreaking astronomical milestone, capturing clear images of auroras on Neptune—a sight astronomers are already hailing as historic.

Auroras occur when charged particles ejected by the Sun interact with a planet’s magnetic field, entering its upper atmosphere and creating a stunning luminous display.

Hints of auroral activity on Neptune were first spotted by Voyager 2 back in 1989, but concrete evidence remained elusive. Over the decades, clear visuals of auroras emerged for Jupiter, Saturn, and Uranus, leaving Neptune as the mysterious missing link—until now.

Thanks to James Webb’s exceptional sensitivity in the near-infrared range, astronomers have not only clearly observed Neptune’s auroras but also captured remarkable details of their distinctive signatures.

Moreover, scientists obtained a spectrum of Neptune’s atmosphere, allowing them to study its composition and measure the temperature of its ionosphere. Excitingly, they detected, for the first time, a prominent emission line indicating the presence of trihydrogen cation—a molecule commonly formed during auroral processes.