- The first photo of the Andromeda galaxy was taken by astronomer Isaac Roberts #OTD in 1888. The image, captured with his 20" reflector, revealed a clear spiral structure. But scientists at the time thought M31 was a nebula, a gas cloud in our galaxy. 🧪 🔭 Image: Isaac Roberts
- Compare that with the view of Andromeda captured by @dalcantonjd.bsky.social et al about ten years ago, using Hubble. Credit: NASA; ESA; J. Dalcanton, B. F. Williams, and L. C. Johnson (U of Washington); the PHAT team; and R. Gendler. esahubble.org/images/heic1...
Dec 29, 2024 17:23
- Their full image is something like 1.5 billion pixels — swimming with detail that Roberts couldn’t have dreamed of. Credit: NASA; ESA; J. Dalcanton, B. F. Williams, and L. C. Johnson (U of Washington); the PHAT team; and R. Gendler.
- The full size original image is listed as 4.3 GB, which, if you have the means, please download and display it. You’ll need a few hundred HD screens. It is probably easier to use this tool that lets you zoom in on parts of the image. esahubble.org/images/heic1...
