The Universe was not always like it is today. Before the Universe was filled with light, it was a dark and lifeless place. This era, the dark ages, ended with the birth of the first stars. When the first star was born, the Universe was changed dramatically. As these first stars continued their lives, they […]
It’s a galaxy-eat-galaxy Universe out there. Today we’re talking about how big galaxies eat little galaxies, and looking at the fabulous arcs of stars stripped and tossed across the dark sky. Our guest today is Dr. Robyn Sanderson, who looks at these tidal tails, and uses them to understand everything from galactic formation to dark matter.