417-MEGAPIXEL ANDROMEDA GALAXY PANORAMA TOOK OVER A DECADE TO MAKE

Summary from the TLDR newsletter

Astronomers have completed the most comprehensive survey of the Andromeda galaxy so far and created a 417-megapixel panorama. The massive 42,208 by 9,870-pixel panorama took over a decade to create and includes more than 600 photos. It is the largest photo mosaic ever created using Hubble Space Telescope observations. The photo shows 200 million stars, a fraction of the estimated one trillion stars in the system. It will help scientists learn more about Andromeda's history. A video showing highlights from the mosaic is available in the article.