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2. It’s Moving Toward Us — Fast
Andromeda is not drifting away like most galaxies; instead, it is racing toward the Milky Way at around 110 km/s — roughly 400,000 km/h. According to NASA and ESA’s Gaia mission, this motion is caused by the mutual gravitational pull between the two giant galaxies.
3. A Future Collision: “Milkdromeda”
In about 4.5 billion years, the Milky Way and Andromeda will collide and eventually merge. Astronomers call the result “Milkdromeda”, a single massive elliptical or lenticular galaxy. Computer simulations from NASA and the Space Telescope Science Institute show that although the galaxies will merge, most stars will pass through the collision unharmed due to the vast distances between them.
4. Home to Enormous Star-Forming Regions and Ancient Clusters
Andromeda hosts several giant star-forming regions, including NGC 206, one of the brightest young stellar associations nearby. It is also rich in globular clusters, some of which are older than 10 billion years. This makes Andromeda a key object for studying the early history of galaxies and star formation.