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Space is cool
Okay, that’s cool!
Like surfers carried to the shore, these stars were caught in the spiral waves of our swirling galaxy, which carried them outward and dumped them in the outer regions of the Milky Way. Naturally, it takes longer for them to travel farther, so the outermost stars are also the oldest.
Funny, that’s not what the graph is showing, by my interpretation. To me or looks like the innermost stars are the oldest. Then the mid stars are the youngest, then outermost are older again but not the oldest.
so the outermost stars are also the oldest.
I don’t think that line necessarily refers to anything going on in the core, but rather “of stars on the outside, the furthest ones are the oldest”.
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
