Betelgeuse and Antares Have Been Observed for Over 2000 Years. Astronomers can use This to Figure out how old They are - Universe Today

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…

Stars dont usually evolve fast enough for humans to notice them change within one lifetime. Even a hundred lifetimes wont do astronomical processes are just too slow. But not always. There are some p… [+9527 chars]

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