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Dictionary
solar time
noun
The local time based on a solar day - the mean time between successive noons.
synonyms
Exact(59)
The Getty exhibits a planisphere clock, demonstrating mean time and solar time in cities around the globe, as well as the timing of the tides in northern ports.
The changes in the solar time follow a different cycle.
Light is the most potent cue for keeping the biological clock in synch with solar time.
HH: Local solar time was fine, when almost all activity was local!
It gave mean solar time, mean sidereal time, equation of time, and could chart the phases of the moon.
The mean solar time at Greenwich is now called Universal Time and was formerly called Greenwich Mean Time.
WV: But why would it work better than, say, regulating time zones so they tie in better with the local solar time?
In the weeks before the winter solstice, sunrise is being pushed later by both the changing angle of the Sun and the slowing of solar time.
But sunset is being pushed in both directions — earlier by the Sun's angle and later by the change in solar time.
Over the decades, centuries and millennia, atomic time would begin to diverge blatantly from solar time because the Earth's rotation, besides being irregularly variable, is also gradually slowing down (see chart).
UTC serves to accommodate the timekeeping differences that arise between atomic time (which is derived from atomic clocks) and solar time (which is derived from astronomical measurements of Earth's rotation on its axis relative to the Sun).
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