The Andromeda-Milky Way Collision

In 4 billion years, the Andromeda Galaxy will collide with the Milky Way, creating a spectacular cosmic event. Historically, Andromeda was debated as a separate galaxy, confirmed by Edwin Hubble's observations. Modern techniques have measured its velocity, predicting an inevitable collision. Simulations show the merger will form a new elliptical galaxy, with minimal impact on the solar system. Future astronomers will witness a transformed night sky, while the Sun expands into a red giant.

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