Cosmology studies the universe at the largest scales, applying the laws of physics over billions of light years and all the way back to the universe's infancy. In dozens of groundbreaking publications, Jim Peebles laid the ...

Our Milky Way is a beautiful spiral galaxy and has been constantly growing since the beginning of time. How did the ancestors of the Milky Way form and look in the first billion years of the universe? Before galaxies form, ...