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If the Sky Is Awake

If the Sky Is Awake

Hardcover

PhilosophyFiction AnthologiesGeneral Poetry

Publisher Price: $27.99

ISBN10: 1734660309
ISBN13: 9781734660302
Publisher: Archive Zero
Published: Jul 14 2020
Pages: 148
Weight: 0.70
Height: 0.38 Width: 5.50 Depth: 8.50
Language: English

Why do we have a 24-hour day, 60-minute hour, and 60-second minute? Thank the ancient Egyptians, Sumerians and Babylonians. Going further back, in humanity's early days, time was simply measured by the interval between sunrise and sunset. Today, we have much more precise methods. One second is defined as the duration of 9,192,631,770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of a cesium 133 atom. Confusing? Yes.

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