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Tag: measurement

Engines Podcast

Engines of Our Ingenuity 2038: Leap Second

Dr. John Lienhard

Posted on January 4, 2021 · Episode: 2038 Putting a leap second in an elastic year. Today, we add a second to our lives.

Tags birth of Christ calendars cesium clock Earth's rotation measurement standards tidal friction timekeeping US Naval Observatory

Engines Podcast

Engines of Our Ingenuity 1837: Distances in Space

Dr. John Lienhard

Posted on March 8, 2020 · Episode: 1837 Distances in space: the meaning of inconceivable. Today, how far is the moon?

Tags A.U. Astronomical Unit distances jet-year measurement parsec space flight

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