Scientists explain the inevitable collision by speculating that the Milky Way and Andromeda galaxies are a bound pair, meaning that they are in orbit around each other.
What is RSS? RSS makes it possible to subscribe to a website's updates instead of visiting it by delivering new posts to your RSS reader automatically. Choose to receive some or all of the updates from A Moment of Science:
A Moment of Science is a daily audio podcast, public radio program and video series providing the scientific story behind some of life's most perplexing mysteries. Learn More »