Question

Give brief information about Universal Standard Time.​

Answer 1

Answer:

universal time (UT)

A measure of time that conforms, within a close approximation, to the mean diurnal rotation of the earth and serves as the basis of civil timekeeping. Universal Time is based on mean sidereal time as measured in Greenwich. It is approximately equal to the mean solar time from Greenwich.....

Answer 2

Universal Time (UT) is a time standard based on Earth's rotation. ... All of these versions of UT, except for UTC, are based on Earth's rotation relative to distant celestial objects (stars and quasars), but with a scaling factor and other adjustments to make them closer to solar time.