Embroidered photopolymer etching on Somerset 100% Cotton paper

One hundred years ago, Edwin Hubble took a series of photos of the Andromeda Galaxy, ultimately changing our perception of the universe. Within its spiral arms, a Cepheid variable star, combined with a spectral measurement called redshift, opened up the possibility that not only was the galaxy outside our own but in a universe magnitudes larger than predicted by astronomers. The thousands of glass negatives at Carnegie Observatory in California attest to his careful work, later published in 1929. This image is a digital copy of a glass plate taken in October 1923 I saw during a visit to the Observatory archives in 2022. Image size 20 x 27cm on Somerset 100% cotton paper.