The Andromeda Galaxy, also known as Messier 31 or M31, is our closest major galactic neighbor. This giant spiral galaxy is a staggering 2.5 million light-years away, yet it can still be seen with the naked eye on a clear night, making it the farthest object visible without a telescope. With a diameter exceeding 200,000 light-years, Andromeda is larger than our Milky Way galaxy and is expected to collide with us in a few billion years, merging into a single behemoth galaxy. | The Brain Maze

Andromeda and the Milky Way are racing toward each other at 402,000 km/h—but their cosmic collision won’t happen for another 4 billion years. 🌌 When they do meet, the galaxies will pass through one another, stretching out stars and gas like cosmic ribbons. After billions of years of this dance, they’ll finally merge into one giant galaxy. | The Galactic Void