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    • New James Webb Space Telescope images of Jupiter might offer clues about its moons

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    NASA has released a new batch of images from the James Webb Space Telescope, this time, featuring Jupiter and some of its moons.

    The images of our solar system鈥檚 biggest planet were taken using the telescope鈥檚 near infrared camera during instrument tests before official operations began on July 12. They come on the heels of NASA鈥檚 first batch of images from the James Webb Space Telescope, a set of deep field photos showing distant galaxies.

    鈥淐ombined with the deep field images released the other day, these images of Jupiter demonstrate the full grasp of what Webb can observe, from the faintest, most distant observable galaxies to planets in our own cosmic backyard,鈥 said Bryan Holler, a scientist at the Space Telescope Science Institute in Baltimore, in a issued Thursday.

    The images show hot spots on Jupiter 鈥 like the Great Red Spot, a storm big enough to swallow the Earth 鈥 in bright yellow. Cooler spots appear in brown. Similarly, images taken with the telescope鈥檚 2.12 micron filter show moons like Thebe and Metis in yellow, while Europa, which is encrusted in ice, appears dark in the centre. Europa鈥檚 shadow is also visible on the surface of Jupiter, to the left of the Great Red Spot.

    鈥淚 couldn鈥檛 believe that we saw everything so clearly, and how bright they were,鈥 said Stefanie Milam, Webb鈥檚 deputy project scientist for planetary science, in a media release on Thursday. 鈥淚t鈥檚 really exciting to think of the capability and opportunity that we have for observing these kinds of objects in our solar system.鈥

    Phil Groff, is executive director of the Royal Astronomical Society of Canada. He said that while other satellites and probes like the Cassini and Juno spacecraft have taken detailed photos of Jupiter, these latest images are exciting because they demonstrate Webb鈥檚 ability to observe heat signatures not visible to the naked eye.

    鈥淏ecause we're looking at infrared and we're seeing heat patterns, we're able to see things in action that sometimes wouldn't be quite as visible,鈥 Groff said. 鈥淪o studying something like the Great Red Spot or studying something like any sort of active process using infrared gives us a chance to look at energy dynamics that are involved in a different way than you wouldn鈥檛 with just visible observation."

    Left: Jupiter, center, and its moons Europa, Thebe, and Metis are seen through the James Webb Space Telescope鈥檚 NIRCam instrument 2.12 micron filter. Right: Jupiter and Europa, Thebe, and Metis are seen through NIRCam鈥檚 3.23 micron filter. (Source: NASA, ESA, CSA, B. Holler and J. Stansberry)

    For example, NASA scientists will attempt to see if they can capture images of plumes of material spewing out of moons like Jupiter鈥檚 Europa and Saturn鈥檚 Enceladus, as well as the signatures of plumes depositing material on the surface of Europa, the agency said in a .

    NASA鈥檚 scientists are particularly interested in learning more about Europa, due to the possibility that it may be in a vast liquid ocean beneath its icy crust.

    Groff said anything scientists are able to learn about Europa and other objects in our solar system using Webb could further our understanding of the rest of the universe.

    鈥淚t will give us a better sense of where there are large concentrations of water and other important chemicals in our system that might be signs for potential life鈥 And also tell us more about how these things are distributed throughout the universe,鈥 he said.

    鈥淚f we assume our solar system isn't unique, taking a look at how our solar system functions 鈦犫 and the chemical composition of it 鈦犫 gives us a sense of what the rest of the universe might be like as well." 

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