How do we measure the vast distances of the Universe?
Space, as we all know, is big. In fact, it’s more than big; it’s vastly, hugely, mind-bogglingly big. But how big is that, exactly, and how do we go about assigning actual, quantifiable distances between planets, nebulae, and other cosmic entities? In this beautifully animated video, produced by the Royal Observatory Greenwich, astrophysicist Olivia Johnson…
