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Astronomy Picture of the Day

Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.

The picture shows Jupiter during a pass of Juno at a time when some of the clouds look like a face. Please see the explanation for more detailed information.

A Face in the Clouds of Jupiter from Juno

Explanation: What do you see in the clouds of Jupiter? On the largest scale, circling the planet, Jupiter has alternating light zones and reddish-brown belts . Rising zone gas, mostly hydrogen and helium , usually swirls around regions of high pressure. Conversely, falling belt gas usually whirls around regions of low pressure, like cyclones and hurricanes on Earth . Belt storms can form into large and long-lasting white ovals and elongated red spots . NASA's robotic Juno spacecraft captured most of these cloud features in 2017 during perijove 6 , its sixth pass over the giant planet in its looping 2-month orbit. But it is surely not these clouds themselves that draws your attention to the displayed image , but rather their arrangement . The face that stands out, nicknamed Jovey McJupiterFace , lasted perhaps a few weeks before the neighboring storm clouds rotated away. Juno has now completed 33 orbits around Jupiter and just yesterday made a close pass near Ganymede , our Solar System's largest moon .

Date June 8, 2021
Credit Image Credit: NASA / JPL-Caltech / SwRI / MSSS / Jason Major
Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)
A service of: ASD at NASA / GSFC,
NASA Science Activation & Michigan Tech. U.