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Yet we are told about these "advanced" Pleiadeans. My goodness, but they evolved quickly! And AFAIK there has never been found a planet around any one of these stars. So where again did these advanced Pleiadeans come from again?
Fortunately, the trusty telescope tells astronomers all they need to know about the age of stars. Essentially, astronomers determine the age of stars by observing their spectrum, luminosity and motion through space. They use this information to get a star’s profile, and then they compare the star to models that show what stars should look like at various points of their evolution. From this, they can determine how old a star is, and how much longer it has to live. This method of determining star age can inaccurate because it relies on the accuracy of the models.
There’s a new technique that was recently developed called gyrochronology, and it’s based on the rotational speed of a star. The speed that a star rotates is steadily changing throughout its life, and it’s dependent on the star’s age and color. If you know a star’s color and rotational speed, you can calculate its age to within an uncertainty of 15%.