What Is the Best Way to Estimate the Age of a Star

question 51

Multiple Choice

What is the best way to estimate the age of a star cluster?

• A) Plot the stars on a Hertzsprung-Russell diagram, and see which stars are still on the main sequence.
• B) Measure the motions of the stars in the cluster, and compare the measurements with theoretical models.
• C) Measure the heavy element abundance for the stars in the cluster.
• D) Count the number of T Tauri stars in the cluster.

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