this post was submitted on 08 Oct 2024
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chapotraphouse
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Polaris Aa is only 60 ish million years old, polaris Ab is under 500 million. Polaris B is the 1.5 billion years old one. Polaris A is the vastly brighter of the three and is typically what people mean when they refer to the three stars.
Also re: the age of sharks, 300 million is a low estimate. It's like 300 to 420 million, depending on how you define a shark.