the-science-llama: Our Night Sky When We Collide With Andromeda In the photos above in order: — Present day — 2 Billion years from now the of the approaching Andromeda galaxy is noticeably larger — 3.75 Billion years, Andromeda fills the field of view — 3.85 Billion years, the sky is ablaze with new star formation — 3.9 Billion years, star... - http://braddougherty.me/post...