universal time wikipedia - EAS
- Universal Time (UT1): Also known as astronomical time or solar time, it refers to the Earth's rotation. It is used to compare the pace provided by TAI with the actual length of a day on Earth. Universal Time (UT) was created at the International Meridian Conference in 1884.www.timeanddate.com/time/aboututc.html
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Universal Time (UT) is a time standard based on Earth's rotation. There are several versions of Universal Time, which differ by up to a few seconds. The most commonly used are Coordinated Universal Time (UTC) and UT1 (see § Versions). All of these versions of UT, except for UTC, are based on
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See morePrior to the introduction of standard time, each municipality throughout the clock-using world set its official clock, if it had one, according to the local position of the Sun (see solar time). This served adequately until the
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See moreThe table shows the dates of adoption of time zones based on the Greenwich meridian, including half-hour zones.
Apart from...
See moreBased on the rotation of the Earth, time can be measured by observing celestial bodies crossing the meridian every day. Astronomers found that it was more accurate to establish time
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See moreThere are several versions of Universal Time:
• UT0 is Universal Time determined at an observatory by observing the diurnal motion of stars or extragalactic radio sources, and also from ranging observations of the Moon...
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