Hubble Space Telescope image of Neptune's southern hemisphere in 2002, showing increased brightness and white cloud bands due to springtime in the planet's long seasons (each lasting over 40 years). The image showcases the impact of sunlight, even though it's 900 times weaker than on Earth.

Astronomy Picture from 13/06/2003

Neptune: Still Springtime After All These Years

Source: https://apod.nasa.gov/apod/ap030613.html


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