Neither of these questions actually makes sense in the form in which it was posed. To see why, let’s start by thinking about how we know the universe is expanding. The expansion of the universe was originally discovered by Hubble, who found that the redshifts of galaxies were proportional to their distances from us. To […]
PhD in physics. I teach physics at Fullerton College, a community college in Southern California. I enjoy writing, playing viola, brewing beer, climbing and mountaineering.