Milky Way-Andromeda collision predicted to be mostly harmless

Across the vast silence of intergalactic space, the Milky Way and Andromeda are drawn toward one another by gravity's patient hand — a collision foretold in the mathematics of motion, yet so distant in time that it humbles every human scale of urgency. In roughly 4.5 billion years, these two great structures will merge, not in catastrophe, but in a slow, almost tender rearrangement of stars and matter. Astronomers remind us that galaxies are mostly emptiness, and that the true reckoning for Earth will come not from a neighboring galaxy, but from the quiet aging of our own Sun.