Sean Carroll's Mindscape: Science, Society, Philosophy, Culture, Arts, and Ideas
303 | AMA | February 2025
Sean Carroll
You're measuring the redshift and using that to infer a distance to the galaxy. And then you can accurately measure its position on the sky, right? You know, its angular position on the sky. So your inferred distance measure to the galaxies is contaminated by the fact that the galaxies are moving.
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