Uploaded July 2026 | Updated September 2026, 2 weeks ago

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Stars slow down with age. Measuring spin and mass lets us date stars.
Check out my long-form videos for more details: youtube.com/channel/UCsVQNnVDpExBbOOt6XpGxyA/videos
#StarAges #Gyrochronology #CosmicEvidence #OldUniverse #YouTubeShorts