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cosmic year
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cosmic year

chronology
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Quick Summary

A cosmic year is the time it takes for our solar system to complete one orbit around the center of the Milky Way galaxy. This journey takes approximately 225 million years.1

For context, a standard year is the time it takes for Earth to orbit the Sun, which is about 365.25 days. The concept of a cosmic year helps astronomers understand the vast timescales involved in galactic motion.1

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