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Its position and apparent movement around the sky.
"Apparent solar time" is based on the "apparent solar day", reckoned by defining as 'solar noon' the moment of the Sun's highest altitude above the horizon on any given day. (That's when the Sun crosses the observer's meridian.)
Apparent solar days do not have the exact same length (from one solar noon to the next) throughout the year, which is surprising to some at first.
This is why the first approaches to creating a solid "standard time" involved determining the length of the 'mean solar day' (average solar day).
Apparent solar time is determined by the position of the Sun in the sky, taking into account Earth's rotation and its elliptical orbit around the Sun. It is based on the Sun reaching its highest point in the sky at 12 noon, varying slightly throughout the year due to Earth's tilt and orbit.
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During which two seasons is apparent solar time ahead of clock time?
Apparent solar time is ahead of clock time in the UK during the winter and spring seasons. This is due to the equation of time, which accounts for the variation in the Earth's orbit and axial tilt throughout the year.
What is it called when time is reckoned by the position of the sun?
It is called "solar time" or "apparent solar time." This method of timekeeping is based on the position of the sun in the sky, with noon defined as when the sun is at its highest point.
If you are playing outside and you judge time by the position of the sun in the sky which of these are you using to gauge time?
apparent solar time
What is time based on the average year round length of the apparent solar day?
Time is based on the average length of the apparent solar day, which is the time it takes for the Sun to return to the same position in the sky, as observed on Earth. This forms the basis for the 24-hour day cycle that we use to structure our activities.
What is an apparent solar day?
An apparent solar day is the time it takes for the Earth to complete one full rotation based on the position of the sun in the sky. It can vary slightly each day due to the Earth's elliptical orbit and axial tilt. This is different from a mean solar day, which is a consistent 24-hour period averaged over a year.
During which two seasons is apparent solar time ahead of clock time?
Apparent solar time is ahead of clock time in the UK during the winter and spring seasons. This is due to the equation of time, which accounts for the variation in the Earth's orbit and axial tilt throughout the year.
Why is apparent solar time not used to measure on a clock?
Because, when using "apparent solar time", the length of a "solar day" varies slightly during the year. (This is because the Earth's orbit isn't exactly circular and the Earth's axis is tilted.) "Clock time" is based on an average (or "mean") of these day lengths, called the "mean solar day". So clocks use "mean solar time". (By coincidence, on the date the question was answered (14th April) "apparent solar time" and 'clock' time are synchronised.) There's another reason for apparent solar time being different from clock time. "Clock time" uses time zones. So, over a wide area, the time on a clock equals the "mean solar time" at a particular, defining, longitude.
Are there different types of solar time?
It very much depends on what is meant by solar time. Not really, it's fairly clear. There are 2 types of solar time: 1) "Apparent solar time". At any particular place this is called the "local apparent solar time", because it depends on longitude. 2) "Mean solar time". This averages out the natural variations of "apparent solar time". (The word "mean" is just a way of saying "average".) This too is depends on longitude of course, but time zones are used to cover a wide area, for convenience.
Why is apparent solar time used to measure time on a clock?
Because, when using "apparent solar time", the length of a "solar day" varies slightly during the year. (This is because the Earth's orbit isn't exactly circular and the Earth's axis is tilted.) "Clock time" is based on an average (or "mean") of these day lengths, called the "mean solar day". So clocks use "mean solar time". (By coincidence, on the date the question was answered (14th April) "apparent solar time" and 'clock' time are synchronised.) There's another reason for apparent solar time being different from clock time. "Clock time" uses time zones. So, over a wide area, the time on a clock equals the "mean solar time" at a particular, defining, longitude.
What is equation of time?
the distance between the solar time i.e Mean time apparent solar time is stated as equation of time. M.t-A.t=equation of time
What is it called when time is reckoned by the position of the sun?
It is called "solar time" or "apparent solar time." This method of timekeeping is based on the position of the sun in the sky, with noon defined as when the sun is at its highest point.
What is time based on the sun called?
Time based on the sun is called solar time. It is measured using the position of the sun in the sky.
What object on the sky do astronomer use to define apparent solar time?
The Sun
If you are playing outside and you judge time by the position of the sun in the sky which of these are you using to gauge time?
apparent solar time
What is time based on the average year round length of the apparent solar day?
Time is based on the average length of the apparent solar day, which is the time it takes for the Sun to return to the same position in the sky, as observed on Earth. This forms the basis for the 24-hour day cycle that we use to structure our activities.
The sun casts the shortest shadow of the day at noon acorrding to what?
Apparent solar time
What is the relationship between apparent solar time and mean solar time?
The Earth "day" of exactly 24 hours is the "mean solar day""Mean" is basically a scientific way of saying "average". It's called a "solar day " because it's based on the position of the Sun in the sky.There are natural variations in the length of the solar day because of the Earth's elliptical orbit and axial tilt.The "mean solar day" averages out the variations that happen during the year.This makes things much more convenient for everyday life."Mean solar time" is based on the "mean solar day".The "apparent solar day" is the what we actually observe, and its length varies from day to day.A sundial measures "apparent solar time". We can convert this time to mean solar time by using something called "the equation of time".Actually, the sundial shows "local apparent solar time".That's because the time shown by a sundial depends on its exact longitude.For convenience, mean solar time has time zones (based on longitude).So, longitude also affects the relationship between these twomeasures of time.
