Nasa’s Hubble Space Telescope has uncovered the hidden history of the Andromeda Galaxy, revealing its complex formation and evolution. By studying ancient stellar populations, Hubble provides critical insights into how this galaxy formed and how it has changed over billions of years. This research helps scientists piece together the broader story of galaxy development in the universe. A significant discovery Hubble made is the detection of stellar streams—faint, scattered trails of stars that reveal past galactic mergers. These streams are the remnants of smaller galaxies that collided with Andromeda billions of years ago. The presence of these streams offers clues about how Andromeda grew through these ancient cosmic interactions, reshaping its structure over time.
