Galactic cannibalism is the violent, ongoing process that builds the modern Milky Way.
Galaxies are not static objects but the products of a long, destructive history. By observing distant, younger galaxies, we can reconstruct the violent assembly of our own home. This video explains how astronomers piece together the history of galaxy formation by treating the universe as a cosmic flip book.
Galaxy formation is a process of constant, violent growth rather than a single event. Astronomers describe this as galactic cannibalism, where galaxies merge and consume one another over vast timescales. Because light takes time to travel across the universe, looking at distant objects allows us to observe these processes as they occurred in the past.
By collecting snapshots of these interactions across different distances, researchers can assemble a chronological narrative of how galaxies evolve. This method allows us to understand the Milky Way not as a finished product, but as a snapshot of a dynamic and ongoing formation process.
