MIT: To keep time, people need something that is very regular to measure against. For many centuries, people used the motion of the earth around the sun. The year and day became the standard at first, then the hour and the minute. But the truth is that it isn’t exactly regular. The planets are pulling on the earth a little bit and creating slight variations.
MIT: To keep time, people need something that is very regular to measure against. For many centuries, people used the motion of the earth around the sun. The year and day became the standard at first, then the hour and the minute. But the truth is that it isn’t exactly regular. The planets are pulling on the earth a little bit and creating slight variations.