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.

2019 April 15
See Explanation.  Clicking on the picture will download
 the highest resolution version available.

Enhanced: The Dolphin Cloud on Jupiter
Image Credit: NASA, Juno, SwRI, MSSS; Processing: Gerald Eichstädt & Avi Solomon

Explanation: Do you see the dolphin-shaped cloud on Jupiter? The cloud was visible last year during perijove 16, the sixteenth time that NASA's robotic spacecraft Juno passed near Jupiter since it arrived in mid-2016. During each perijove, Juno passes near a slightly different part of Jupiter's cloud tops. The dolphin shape may be surprising but is not scientifically significant -- clouds on Jupiter and Earth are constantly shifting and can temporarily mimic many familiar shapes. The cloud appears in Jupiter's South Temperate Belt (STB), a band of dark and dropping clouds that rings the planet and also contains Oval BA, dubbed Red Spot Jr. The featured image was digitally processed to enhance colour and contrast. Juno's next swoop near Jupiter -- perijove 20 -- will occur on late May.

Tomorrow's picture: larger than life


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Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)
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