Depending on where we look, the universe is expanding at different rates. Now, scientists using the James Webb and Hubble space telescopes have confirmed that the observation is not down to a measurement error.
Pretty much this. In a (hopefully) more direct metaphor, are we sure we’re using a ruler to calculate the length of a line, and not using a ruler to calculate the temperature of a paper?
Pretty much this. In a (hopefully) more direct metaphor, are we sure we’re using a ruler to calculate the length of a line, and not using a ruler to calculate the temperature of a paper?