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Minute

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A minute is a standard unit used to measure time. It is defined as being equal to 60 seconds. While it is not technically part of the International System of Units (SI), it is accepted for use with those units. The official symbol for a minute is "min" without a dot. Sometimes, people use a symbol called a prime to show minutes informally.

The concept of the minute relies on dividing larger chunks of time into smaller pieces. The name comes from the Latin phrase "pars minuta prima." This phrase translates to "first small part." This name describes the first step in breaking down an hour. This process can be continued with the "second small part." This is the Latin origin of the word "second," or "pars minuta secunda." In the past, people even used "thirds" to divide a second. Today, most people use decimals to divide seconds into even smaller amounts.

Historically, the way we divide time has changed through many centuries. In 1000 CE, a thinker named Al-Biruni first subdivided the hour using a sexagesimal system. This means he used a system based on the number 60. He used minutes, seconds, thirds, and fourths while discussing Jewish months. Later, in 1267, the medieval scientist Roger Bacon also used these divisions. He wrote in Latin about the time between full moons. He defined these periods using hours, minutes, seconds, thirds, and fourths after noon.

As our understanding of time grew, we created tools to show it. For a long time, clocks did not always show minutes clearly. In 1577, the clock maker Jost Bürgi changed this for an astronomer. He made a clock that included a minute hand for Tycho Brahe. This allowed people to see the passage of minutes more easily.

Making smaller tools like watches required even more specific inventions. For a long time, watches were not precise enough to show minutes. This changed in 1675 because of an English watchmaker named Thomas Tompion. He invented the hairspring, which is a tiny, delicate spring. This invention made it possible for watches to have minute hands. This allowed people to carry precise time measurements with them everywhere.

Most minutes are very steady, but they are not always exactly 60 seconds. In the UTC time standard, minutes can occasionally change. This happens because of something called leap seconds. On rare occasions, a minute might have 61 seconds to keep time accurate. There is also a rule for a "negative leap second." This would result in a minute that is only 59 seconds long. However, this has not happened in more than 40 years under this system.

Understanding the minute helps us connect to many other areas of science. The way we divide time is similar to how we divide space. For example, the prime symbol for minutes and the double prime for seconds is used in geometry. This notation can be seen in how we measure latitude and longitude. It is also similar to how we measure length. In some systems, a foot is the first cut of a yard, and inches are the second. These connections show how humans use math to organize the entire world.

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