APOD: 2026 September 27 – Andromeda Before and After Photoshop
APOD Science APOD APOD: 2026 September 27 –… Today’s APOD Archive Submissions Index Search Calendar RSS Education About Discuss APOD Astronomy Picture of the Day Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. Before After Andromeda Before and After Photoshop Explanation: What does the Andromeda galaxy really look like? The featured before image shows how our Milky Way Galaxy ‘s closest major galactic neighbor really appears in a long exposure through Earth ‘s busy skies and with a digital camera that introduces normal imperfections. The picture is a stack of 223 images, each a 300 second exposure, taken from a garden observatory in Por t ugal during 2019. Obvious image deficiencies include bright parallel airplane trails , long and continuous satellite trails , short cosmic ray streaks , an...
