Simulated Baby Milky Way
A simulation of a galaxy made in the image of our own Milky Way gives us a glimpse into galactic history. This particular snapshot looks back 5 billion years.
The simulation, created at Durham University’s Institute for Computational Cosmology, suggests that the ancient stars which skirt the edges of the Milky Way – stars nearly as old as the universe itself – were not born in our galaxy but ripped out of smaller ones during collisions in the early cosmos.
Image: Andrew Cooper/John Helly/Durham University