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Q: Why is the apparent solar day longer in January?
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What a day about as long as a day on earth?

Mars has a similar day length to Earth, a little longer at 24h 39m 35s (apparent solar day)


Mars length of one day?

Mars has a similar day length to Earth, a little longer at 24h 39m 35s (apparent solar day).


Planet with the period of revolution closest to Earth's?

Mars has a similar day length to Earth, a little longer at 24h 39m 35s (apparent solar day).


Which planet rotates almost the same as earth?

Mars. It has a similar day length to Earth, a little longer at 24h 39m 35s (apparent solar day).


What is longer a sidereal day or solar day?

a solar day


What is apparent solar time determined by?

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).


What is time based on the average year round length of the apparent solar day?

Standard solar time


Is one complete spin by mars the same as one complete spin by earth?

Almost. Mars has a similar day length to Earth, a little longer at 24h 39m 35s (apparent solar day).


What is a mean solar day?

It's the average length of the "apparent solar day" throughout the year, 24 hours exactly for planet Earth.


How long is night on Mars?

An apparent or solar day on mars is 24h 39min and 35sec, so a night on mars will be 12h 19min and 47sec on average. A bit longer than on earth.


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.


What is an apparent solar day?

the amount of time the sun takes to cross the meridian twice