Neptune's Clouds Vanish: Sun's Influence Revealed

Clouds on Neptune have largely disappeared, with only the south pole still showing cloud activity, according to observations from 1994 to 2022. The disappearance of clouds is linked to the solar cycle, with increased ultraviolet (UV) light from the sun triggering cloud formation on Neptune. The correlation between the solar cycle and cloud cover suggests that the sun's UV rays may cause a photochemical reaction that produces clouds on the icy giant. However, further research is needed to understand the complex factors influencing cloud formation and to determine how long the current near-absence of clouds will last.