The Universe Is 13.8 Billion Years Old—Here’s How We Know

The Universe Is 13.8 Billion Years Old—Here’s How We Know
Measuring the distance to various galaxies and the speed at which they are moving away from each other as the universe expands is one way to estimate the age of the cosmos. NASA, ESA, F. Summers, Z. Levay, L. Frattare, B. Mobasher, A. Koekemoer and the HUDF Team (STScI)

In a recent article, Popular Science summarized research that discovered the age of the universe, drawing on work by Daniel Scolnic, an assistant professor of Physics.