The dark UV ovals were first detected by NASA’s Hubble Space Telescope during the late 1990s at the north and south poles. During the Cassini spacecraft’s flyby of Jupiter in 2000, it also confirmed these ovals at Jupiter’s north pole, but the ovals did not get a lot of attention from scientists.

While Jupiter’s Great Red Spot has been a constant feature of the planet for centuries, University of California, Berkeley, astronomers have discovered equally large spots at the planet’s

The dark UV ovals were first spotted by NASA’s Hubble spacecraft in the late 1990s, but have only recently been studied in depth.