Galaxy collisions spark cosmic star factories
Galaxy mergers are dramatic cosmic events where colliding galaxies compress gas, triggering explosive bursts of star formation that reshape the universe.
When galaxies collide, their gravitational dance doesn't just merge them; it ignites a spectacular burst of star formation. This cosmic chaos compresses gas and dust, the raw ingredients for stars, leading to "starbursts" where new stars form hundreds of times faster than usual. We see this in action with the Antennae Galaxies, a nearby merger producing thousands of brilliant young stars. These events are crucial for how galaxies evolve, building up stellar populations and supermassive black holes. Our own Milky Way will experience a similar starburst when it merges with Andromeda in 4.5 billion years, lighting up the future night sky.