One of Juno mission's recent accomplishments is measuring the Great Red Spot's gravity, which complements an earlier study that measured its depth. But observations on this storm suggest that it might be shrinking.
NASA's Juno probe has finally got close enough to Jupiter's Giant Red Spot to measure its depth, which measures between 186 to 310 miles (300 to 500 kilometers) deep.
The Great Red Spot in Jupiter, which is massive and slowly spreading across Jupiter, stretches hundreds of miles into the planet's atmosphere, NASA's Juno spacecraft says.
NASA's Juno spacecraft will fly past Ganymede at 1:35 p.m. EDT. The flyby will be the closest-known since Galileo spacecraft made its penultimate close approach on May 20, 2000.
Ganydene, the largest moon in the solar system, is the only one that has its own magnetic field, and the most differentiated of all of its kind, and it possibly possess "a subsurface ocean of liquid water."