Graphic Images Illustrating the Hubble Constant Tension
The first graphic below is from an excellent Ethan Siegel article: This Is How Astronomers Will Resolve The Expanding Universe Controversy. It's a great overall review on this topic.
His comments on it: “Modern measurement tensions from the distance ladder (red) with early signal data from the CMB and BAO (blue) shown for contrast. It is plausible that the early signal method is correct and there’s a fundamental flaw with the distance ladder; it’s plausible that there’s a small-scale error biasing the early signal method and the distance ladder is correct, or that both groups are right and some form of new physics (shown at top) is the culprit. But right now, we cannot be sure.(ADAM RIESS (PRIVATE COMMUNICATION))”
Another one from this tweet. Photo by Cora Dvorkin.
