# Antwort Why is 1 minute 60 seconds? Weitere Antworten – Why are there sixty seconds in a minute

Who decided on these time divisions THE DIVISION of the hour into 60 minutes and of the minute into 60 seconds comes from the Babylonians who used a sexagesimal (counting in 60s) system for mathematics and astronomy. They derived their number system from the Sumerians who were using it as early as 3500 BC.There are 60 seconds in 1 minute. In other words, a second is 160 of a minute. The second is called the base unit of time. That means scientists defined one minute to be 60 seconds.The reason they call it a “second” is because it is the second division of an hour by 60. The minute is the first division of an hour by 60. Therefore, by definition, a second must be a 60th of a minute. But you can divide a minute by 99 if you want to.

Who invented the 24-hour day : The ancient Egyptians are seen as the originators of the 24-hour day. The New Kingdom, which lasted from 1550 to 1070 bce, saw the introduction of a time system using 24 stars, 12 of which were used to mark the passage of the night. Hours were of different length, however, as summer hours were longer than winter hours.

## Why is a day 24 hours

But a counting system based on twelve is called a duodecimal system. The Egyptians also divided the dark hours into 12 sections based on the appearance in the night sky of 12 stars as the night advanced. So with 12 hours of daylight and 12 of night, the 24 hour day was established.

Is a day 23 hours, 56 minutes, and 4 seconds : Earth rotates once in about 24 hours with respect to the Sun, but once every 23 hours, 56 minutes and 4 seconds with respect to other distant stars (see below). Earth's rotation is slowing slightly with time; thus, a day was shorter in the past. This is due to the tidal effects the Moon has on Earth's rotation.

In Mesopotamia the year was divided into 12 based on lunar patterns, which coincided with the 12 zodiac signs, which may have prompted the emergence of the 12-hour clock introduced by the Babylonians.

As early as 3500BC the Sumerians, an ancient civilisation who lived in what is now Iraq, began to use the number 60 for counting because they could divide it neatly by lots of other numbers, making calculations easier.

## Why is a day not 12 hours

Refraction: Light Lingers

Another reason for why the day is longer than 12 hours on an equinox is because the Earth's atmosphere refracts sunlight. This refraction, or bending of the light, causes the Sun's upper edge to be visible from Earth several minutes before the edge actually reaches the horizon.On average, this is 24 hours (86,400 seconds). As a day passes at a given location it experiences morning, noon, afternoon, evening, and night. This daily cycle drives circadian rhythms in many organisms, which are vital to many life processes.Over months and years, the length of each day varies by tiny increments of time in agreement with Earth's shifting systems. These shifts do not significantly affect the total hours of daylight or nighttime in a given season, but instead refer to millisecond shifts in the measurement of a 24-hour day.

Earth rotates once in about 24 hours with respect to the Sun, but once every 23 hours, 56 minutes and 4 seconds with respect to other distant stars (see below). Earth's rotation is slowing slightly with time; thus, a day was shorter in the past. This is due to the tidal effects the Moon has on Earth's rotation.

Why is a day 24 hours not 23 hours 56 minutes : But now it has to cover one degree extra. So in total it takes 23 hours 56 minutes to complete one rotation. And four minutes extra to face the Sun. Again.

Is a day actually 23 hours : To summarize: Earth's actual rotation period is about 23 hours, 56 minutes. We call this a sidereal day, because we measure it by the stars (and sidereal means “related to the stars”).

## Who decided a day was 24 hours

astronomer Hipparchus

Hours were of different length, however, as summer hours were longer than winter hours. The ancient Greek astronomer Hipparchus later suggested splitting the day into 24 equinoctial hours.

Is it possible to observe three days at the same time on Earth Yes! It's not only possible, but it happens every day near the dateline.Another way to measure a day is to count the amount of time it takes for a planet to completely spin around and make one full rotation. This is called a sidereal day. On Earth, a sidereal day is almost exactly 23 hours and 56 minutes.

Will we ever have 25 hours a day : Scientists at the Technical University of Munich (TUM) have discovered that a day on Earth could eventually extend to 25 hours.