The James Webb Space Telescope's images of spiral galaxies are stunning, and there's compelling science behind them.
” As the title makes clear, the JWST’s ability to see PAH emissions is a game changer. “The earliest stages of star formation occur enshrouded in dust and are not observable in the optical. Here we leverage the extraordinary new high-resolution infrared imaging from JWST to begin the study of dust-embedded star clusters in nearby galaxies throughout the Local Volume,” the authors of that paper write.is a combination of Hubble and JWST data from NGC 7496.
This video shows the difference between Hubble’s view of IC 5332 and the JWST’s view. The Hubble image is hazy and less detailed, though still beautiful and useful. This JWST images shows the double-barred spiral galaxy NGC 1365. The JWST’s MIRI instrument reveals the clumps of gas and dust in the interstellar medium lit up by the galaxy’s young stars. NGC 1365 is twice as broad as the Milky Way. Image Credit: NASA/ESA/CSA
This is the JWST’s MIRI during testing in a clean room in 2010. MIRI has to be kept cold to do its work, and a helium gas mechanical cooler takes care of that. Image Credit: By NASA – https://jwst.stsci.edu/files/live/sites/jwst/files/home/science%20planning/science%20corner/flyer/_documents/miri-pocket-guide.pdf, Public Domain, https://commons.wikimedia.org/w/index.php?curid=53870317
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