https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13973328Edit ImageSaveSaveEditCropCustom TextAstronomy: a quadrant and a sextant. Engraving.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 1200 x 700 px | 300 dpiLarge JPEG 3500 x 2041 px | 300 dpiBest Quality JPEG 3542 x 2065 px | 300 dpiFree DownloadAstronomy: a quadrant and a sextant. Engraving.More