It's the second year photos are taken as part of the Outer Planets Atmospheres Legacy (OPAL) project which helps scientists track shifting weather patterns and trends.

This year's series, for example, shows that a large storm visible in the 2018 Hubble image in the north polar region has vanished. Even the planet's banded structure reveals subtle changes in colour.

Saturn's signature rings are still as stunning as ever, NASA enthused. "The image reveals that the ring system is tilted toward Earth, giving viewers a magnificent look at the bright, icy structure."

"This image reveals an unprecedented clarity only seen previously in snapshots taken by NASA spacecraft visiting the distant planet."

A Hubble time-lapse movie shows the orbits of some of Saturn's icy moons as they circle the planet over an 18-hour period.