https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13957739Edit ImageSaveSaveEditCropCustom TextOptics: spectra of various stars, including our sun. Coloured process print by Cassell.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 1200 x 691 px | 300 dpiLarge JPEG 3485 x 2007 px | 300 dpiFree DownloadOptics: spectra of various stars, including our sun. Coloured process print by Cassell.More