What Determines the Length of the Day? NIST
“A day, as we all know, is 24 hours, also known as 1,440 minutes or 86,400 seconds. Or if you’re an atomic clock maker, exactly 794,243,384,928,000 cycles of microwave radiation tuned to the ticking rate of the cesium atom. Regardless, a day is a day, right? Actually, no: An Earth day isn’t a fixed interval of … Read more