2622. Angular Diameter Turnaround
title text: Thank you to Katie Mack for teaching me about this effect, and to Janelle Shane for describing redshifts as 'like galaxies sinking into a pool of dilute blood,' which is how I'll see them from now on.
(https://xkcd.com/2622)
(https://www.explainxkcd.com/wiki/index.php/2622
)