Using ancient observations to classify stars - Phys.org

Stars don't usually evolve fast enough for humans to notice them change within one lifetime. Even a hundred lifetimes won't do—astronomical processes are just too slow. But not always. There are some phases of stellar evolution that happen quickly, and when t…

Stars don't usually evolve fast enough for humans to notice them change within one lifetime. Even a hundred lifetimes won't doastronomical processes are just too slow. But not always. There are some … [+9348 chars]

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