Webb and Hubble image Whirlpool galaxy

ESA released a new image of the Whirlpool Galaxy, also known as M51 or NGC 5194, on May 13 as astronomers published fresh results on how young star clusters emerge from their birth clouds. Live Science followed on May 17 with a “Space photo of the week” article built around a Webb-and-Hubble composite of one of the galaxy’s spiral arms. The image package draws on observations from the James Webb Space Telescope and the Hubble Space Telescope, which researchers used to trace young clusters across ultraviolet-to-infrared wavelengths. A Nature Astronomy paper published on May 7 said the combined data covered thousands of young star clusters in four nearby galaxies, including M51. ### Why are astronomers looking so closely at the Whirlpool Galaxy? M51 is one of the nearest and best-known grand-design spiral galaxies, making it a frequent target for both Hubble and Webb. NASA says the Whirlpool Galaxy lies about 31 million light-years from Earth and its face-on orientation makes its spiral arms, dust lanes and star-forming regions especially clear. ESA’s May 13 release focused on star-forming regions inside M51, where bright young stars, ionized gas and dust can be separated by looking at different wavelengths of light. (esa.int) The FEAST team used M51 alongside M83, NGC 628 and NGC 4449 to study what happens just after star clusters form. The Nature Astronomy paper said Hubble and Webb observations let researchers examine clusters that are still partly embedded in their natal material as well as clusters that have already cleared it away. ### What does the new composite actually show? (science.nasa.gov) ESA credited the image to Webb, NASA and CSA, with Alex Pedrini, Angela Adamo and the FEAST JWST team named in the release. The color treatment separates different components of the galaxy: blue marks bright stars, orange and yellow trace hot ionized gas, and red highlights complex molecules and dust grains, according to Stockholm University’s description of the same image set. That makes the composite useful not just as a picture, but as a map of where stars have formed, where gas is still being heated, and where dust remains thickest. (nature.com) Live Science said its May 17 article used a combined Webb-and-Hubble view of one spiral-arm section of the Whirlpool Galaxy. The publication linked the image to the new star-formation results rather than presenting it as a standalone image release. ### What did the study find about young star clusters? Nature Astronomy published the paper on May 7 under the title “The emerging timescale of young star clusters regulated by cluster stellar mass.” The journal summary said Hubble and Webb observations showed that massive young star clusters disperse their natal gas faster than low-mass clusters. (esa.int) Phys.org, summarizing the research, said the faster-clearing clusters begin filling their host galaxies with ultraviolet light sooner. (livescience.com) Alex Pedrini, the paper’s first and corresponding author, said in a Stockholm University release that he was excited to see the emerging timescale tied to a cluster’s stellar mass. Stockholm University said the team measured emission from ultraviolet to infrared wavelengths to estimate how long clusters remain embedded in the gas and dust from which they formed. (nature.com) ### Why combine Webb and Hubble instead of using one telescope? Hubble observes visible and ultraviolet light, while Webb is optimized for infrared wavelengths that can penetrate dust more effectively. The May 2026 study relied on that combination to identify both exposed young stars and clusters still wrapped in dusty birth clouds. NASA’s M51 material says visible-light views highlight pink star-forming regions and blue star clusters, while near-infrared views sharpen the dust structure. (su.se) The result is a layered view of star formation rather than a single snapshot. By comparing wavelengths, researchers can estimate where stellar feedback has already pushed gas aside and where star formation is still hidden inside denser material, according to the study summary and ESA’s image release. ### What comes next from this work? The May 7 Nature Astronomy paper already extends beyond M51 to three other nearby galaxies, and the FEAST team’s image set indicates the same observing strategy can be used across multiple environments. (nature.com) Live Science’s May 17 article points readers to the Whirlpool image as one entry in that broader research effort. The next reference points for readers are the published Nature Astronomy paper and the ESA image release naming Pedrini, Adamo and the FEAST JWST team.