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Fotografie + English: NGC 4321 (Hubble + Webb) (Uploaded on February 7, 2024)

• Face-on spiral galaxy, NGC 4321, is split diagonally in this image: The James Webb Space Telescope’s observations appear at bottom left, and the Hubble Space Telescope’s on top right. Webb and Hubble’s images show a striking contrast, an inverse of darkness and light. Why? Webb’s observations combine near- and mid-infrared light and Hubble’s showcase visible light. Dust absorbs ultraviolet and visible light, and then re-emits it in the infrared. In Webb's images, we see dust glowing in infrared light. In Hubble’s images, dark regions are where starlight is absorbed by dust.
• In Webb’s high-resolution infrared images, the gas and dust stand out in stark shades of orange and red, and show finer spiral shapes with the appearance of jagged edges, though these areas are still diffuse.
• In Hubble’s images, the gas and dust show up as hazy dark brown lanes, following the same spiral shapes. Its images are about the same resolution as Webb’s, but the gas and dust obscure a lot of the smaller-scale star formation.

• More information: https://webbtelescope.org/contents/media/images/2024/105/01HMC157NG9PDPKYDPHFZMC35Z
• Read the feature: https://science.nasa.gov/missions/webb/nasas-webb-depicts-staggering-structure-in-19-nearby-spiral-galaxies
• Full set of images: https://webbtelescope.org/contents/news-releases/2024/news-2024-105#section-id-2

• NASA, ESA, CSA, STScI, Janice Lee (STScI), Thomas Williams (Oxford), Rupali Chandar (UToledo), Daniela Calzetti (UMass), PHANGS Team
• Image description: Two observations of a portion of the galaxy NGC 4321 are split diagonally, with Webb’s observations at bottom left and Hubble’s at top right. The galaxy’s core appears centered at the far-right edge, and the galaxy’s arms, which are cropped, appear to rotate counterclockwise. In Webb’s image, the spiral arms are composed of many filaments in shades of orange, with prominent dark gray or black areas. In Hubble’s image, the spiral arms are a mix of bright blues, pinks and dark brown dust lanes, and the core is a pale yellow and bright blue.
• Author: NASA's James Webb Space Telescope

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FLICKR – https://www.flickr.com/photos/nasawebbtelescope/53515482113/

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