Messier 74, NGC 628 The spiral galaxy (also known as NGC 628) lies some 32 million light-years away toward the constellation Pisces. An island universe of about 100 billion stars with two prominent spiral arms, M74 has long been admired by astronomers as a perfect example of a grand-design spiral galaxy. This image is a combination of the Hubble image and the JWST image. It shows the Hubble image with the fantastic web of cosmic dust and gas that underlies the visual image from the JWST telescope.   The reddish web come largely from the 7700nm wavelength JWST  image with the Hubble image centered at 600nm wavelength.  For comparison the Hubble image can be seen at this reference. https://earthandskyimaging.com/product/messier-74-ngc-628-hubble/ The JWST image can be seen at this reference.https://earthandskyimaging.com/product/messier-74-ngc-628-jwst/ These images were produced by Michael Adler from the raw data obtained from the Hubble Legacy Archive and the Mikulski Space Telescope Archive.

The distinctive purple appearance of Brammer’s image is due to the unique chemical composition of NGC 628’s dust clouds, which are primarily made up of large molecules called polycyclic aromatic hydrocarbons, says Michael Merrifield at the University of Nottingham, UK.