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Astronomers Find the Edge of the Milky Way
(skyandtelescope.org)
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this post was submitted on 24 Apr 2026
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That's wild. Finding the edge by finding an inversion in age of stars. I read that just trying to figure out how they can tell how old a star is in the first place.
One of the ways they used in this study was isochrone fitting, where you compare the evolution of stars in a cluster to figure out their age