Scientists using the James Webb and Hubble space telescopes have confirmed one of the biggest head-scratchers in modern ...

astronomers can chain Cepheid readings into a "cosmic distance ladder" to peer deeper into the universe's past. But this is where the headache begins. Using the European Space Agency's Planck ...

All of these were based on the cosmic distance ladder, which uses a series of observations to calculate ever greater cosmic distances, each building on the previous method. But in the past few ...