NASAのインスタグラム(nasa) - 11月8日 10時04分

Jupiter’s intense northern and southern auroras present a pulsating polar puzzle to scientists, according to a new study using data from our Chandra X-ray and ESA's XMM-Newton observatories. Using these observations, a team of researchers produced maps of Jupiter's X-ray emissions and identified an X-ray hot spot at each pole that had very different characteristics. Swipe to see both poles of Jupiter.

The X-ray emission at Jupiter's south pole consistently pulsed every 11 minutes, but the X-rays seen from the north pole were erratic, increasing and decreasing in brightness — seemingly independent of the emission from the south pole. Each hot spot can cover an area equal to about half the surface of the Earth.

This makes Jupiter particularly puzzling. X-ray auroras have never been detected from our Solar System's other gas giants, including Saturn. Jupiter is also unlike Earth, where the auroras on our planet's north and south poles generally mirror each other because the magnetic fields are similar.

Credit: X-ray: NASA/CXC/UCL/W.Dunn et al, Optical: South Pole: NASA/JPL-Caltech/SwRI/MSSS/Gerald Eichstädt /Seán Doran; North Pole: NASA/JPL-Caltech/SwRI/MSSS
#nasa #space #jupiter #chandra #xmmnewton #xray #aurora #juno #spacecraft #storm #planet #polar #cloudscape #picoftheday #solarsystem #astronomy #science

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