Polaris has been a guiding light of navigation for centuries. But Polaris also happens to be the closest cepheid variable to our sun. These, together with the type II-A supernovae constitute standard units of luminosity, used to estimate distances for far-away galaxies
Recently, it was discovered that our distance measurement of Polaris was off by 30%.
I'm not familiar though which measurements rely more on cepheids over IIa supernovae, so i'm curious what cosmological measurements will be affected by this adjustment
It is undoubtedly romantic that a star that has been a lighthouse for some many generations of sea explorers, it also represents a beacon for interstellar distances, and might still tell us things that we didn't know