The James Webb Space Telescope has spotted some of the earliest and most distant galaxies, but how can we be sure these early galaxies aren't closer and more recent? When you purchase through links on ...

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 ...

Physicists have improved the accuracy of a technique that uses variable stars to measure distances in the universe, providing a new figure for its expansion rate. When you purchase through links on ...