Instrumentation2025-12-041 minarXiv:2512.05078expressHow a galaxy's shape reveals its historyAstronomers read the history of galaxies by their portraits. Previously, they used either lengthy analysis of light by colors or quick filtered snapshots, losing the details of shape.Mikaeel Yunus·John F. Wu·Benne W. HolwerdaCecilia Payne-GaposchkinEdwin HubbleFred Hoylegalactic evolutiongalaxy mergergalaxy👍👎☆SimplePopularAdvanced