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This may address what you want; if it does not, please restate the question. They don't call it "equator" for nothin'. It divides the earth into equal (probably not down to the nearest molecule) hemispheres, north and south. It is also the mid-way mark between the 'poles', north and south. Yes, that is obvious. When it is summer in the north, the north pole receives sun around the clock, and the south pole is in darkness around the clock. Six months later, the light situation is reversed. We also know that during the summer in the temperate zones, daylight lasts longer than night time. The Big Question is: Will the lengths of daylight and night time change at the equator throughout the year the way it does for the poles and for the temperate zones? No, it really doesn't. The equator represents a kind of 'averaging' of daylight and night time for the north and the south. If you live on the equator, you may never have summer sunlight until 8, 9 or 10 pm the way you would in other parts of the globe, but you will also never have shorter or non-existent periods of sunlight. The movements of the earth aren't quite as simple as we can easily imagine from playing with globes; for example the orientation toward the sun of the earth's poles is not most pronounced at the moments of perihelion and aphelion. Learning this was a mind-blowing revelation for me. There are also some subtle changes in earth's orbital velocity because of our elliptical orbit. But our rotational, or axial velocity is virtually constant. So we probably cannot say that sunrise and sunset are always precisely, down to the smallest fraction of a second, at the same times every day at the equator. But the differences are minor and far too small to experience in any direct way.
Wiki User
∙ 6y ago
Wiki User
∙ 10y agoNo matter what part of the year it is, no matter where in its orbit the earth is and no matter where the earth's rotational axis is pointing with respect to the sun, about half of the equator is always exposed to sunlight.
(edit) There are only two days every year when an equatorial day has nearly equal durations of light and dark. Most succinctly, this is timed from the instant when the Equatorial Disk crosses the Ecliptic Disk.
Some may choose to put it that this is the instant at which transit of the Sun from the Northern Hemisphere to the Southern Hemisphere, or the other change of seasons, when it moves from the Southern Hemisphere to the the Northern takes place. The Equator is in fact an imaginary line of infinitesimal thickness and so, although the apparent transit of the Sun is allocated a 24 hour period, it is a fact that the transit time in extremely swift and will rarely occur in the same geographical position East or West of Greenwich each year. This means that equality of day and night is only approximate.
The whole of this explanation is governed by the fact that the Equatorial Disk and the Epileptic Disk are set at a fixed angle of twenty three and a half degrees to each other. The same angles that the Tropic of Capricorn and the Tropic of Cancer make with the Equator measured from the centre of the Earth. The Tropic of Capricorn, being the most Southern excursion of the Sun before reversing, while the Tropic of Cancer is the most northern excursion.
Wiki User
∙ 13y agoYes, it does. Which, precisely, depends on what season it is, and which direction you move.
Except at either of the Equinoxes, when it doesn't.
Wiki User
∙ 11y agoWiki User
∙ 12y agoThey become shorter.
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Which hemisphere has the longest day length in June?
Antarctica
Do the length of days change on December 21st?
The length of daylight changes every day. In the northern hemisphere, having been getting shorter every day for 6 months, they start getting longer from December 21st. In the southern hemisphere, having been getting longer every day for 6 months, they start getting shorter from December 21st.
What does the spring equinox mean?
In the northern hemisphere it is the 21st of March. In the southern hemisphere it is the 21st of September.In the northern hemisphere it is the 21st of March. In the southern hemisphere it is the 21st of September.In the northern hemisphere it is the 21st of March. In the southern hemisphere it is the 21st of September.In the northern hemisphere it is the 21st of March. In the southern hemisphere it is the 21st of September.In the northern hemisphere it is the 21st of March. In the southern hemisphere it is the 21st of September.In the northern hemisphere it is the 21st of March. In the southern hemisphere it is the 21st of September.In the northern hemisphere it is the 21st of March. In the southern hemisphere it is the 21st of September.In the northern hemisphere it is the 21st of March. In the southern hemisphere it is the 21st of September.In the northern hemisphere it is the 21st of March. In the southern hemisphere it is the 21st of September.In the northern hemisphere it is the 21st of March. In the southern hemisphere it is the 21st of September.In the northern hemisphere it is the 21st of March. In the southern hemisphere it is the 21st of September.
In between September 23 and December 22 do days become shorter or longer?
Days get `longer` between June 21st and December 21st for the southern Hemisphere, while they get shorter for those in the northern hemisphere. Between December 21st and June 21st, the days get longer for those in the northern hemisphere and shorter for those in the southern hemisphere.
Which is the longest day in northern hemisphere?
The first day of summer is the longest day in the northern hemisphere. The first day of winter is the shortest.
What is the length of day in northern hemisphere in march?
24 Hours
Which hemisphere has the longest day length in June?
Antarctica
What occurs on the vernal equinox?
Across the whole planet the day and night length are the same and it is the first day of Spring in the northern hemisphere and the first day of Autumn in the southern hemisphere.
Why Does the length of day increase?
During the spring, the length of the day (in the northern hemisphere) is increasing because the Earth is moving in its orbit around the sun, closer to the point at which the northern hemisphere is pointed toward the sun by 23 and a half degrees (the axial tilt) which gives it more daylight and less night.
May 15 gaining or losing time each day?
If May 15 gains time each day, it means the days are longer than 24 hours. If May 15 loses time each day, it means the days are shorter than 24 hours. However, in reality, the length of a day remains constant at 24 hours due to Earth's consistent rotation.
Do the length of days change on December 21st?
The length of daylight changes every day. In the northern hemisphere, having been getting shorter every day for 6 months, they start getting longer from December 21st. In the southern hemisphere, having been getting longer every day for 6 months, they start getting shorter from December 21st.
What does the spring equinox mean?
In the northern hemisphere it is the 21st of March. In the southern hemisphere it is the 21st of September.In the northern hemisphere it is the 21st of March. In the southern hemisphere it is the 21st of September.In the northern hemisphere it is the 21st of March. In the southern hemisphere it is the 21st of September.In the northern hemisphere it is the 21st of March. In the southern hemisphere it is the 21st of September.In the northern hemisphere it is the 21st of March. In the southern hemisphere it is the 21st of September.In the northern hemisphere it is the 21st of March. In the southern hemisphere it is the 21st of September.In the northern hemisphere it is the 21st of March. In the southern hemisphere it is the 21st of September.In the northern hemisphere it is the 21st of March. In the southern hemisphere it is the 21st of September.In the northern hemisphere it is the 21st of March. In the southern hemisphere it is the 21st of September.In the northern hemisphere it is the 21st of March. In the southern hemisphere it is the 21st of September.In the northern hemisphere it is the 21st of March. In the southern hemisphere it is the 21st of September.
What month contains the shortest day in the northern hemisphere?
All days are the same length. Except in the polar zones, each day is characterized by some period ofsun-up, and the rest of the time sun-down.In the northern hemisphere, the longest period of sun-up occurs in June, on the day of the Solstice.
What is equinoxs?
it will fall on the 22nd September 2012 in the Northern Hemisphere. During an equinox the length of day and night in both hemispheres is very much the same . 12 hours day and night. After this date in the northern hemisphere the days will become shorter with the advance of winter
The length of day?
if today sun sets at 6 pm in northern hemisphere , then at how many minutes will it set tomorrow
In between September 23 and December 22 do days become shorter or longer?
Days get `longer` between June 21st and December 21st for the southern Hemisphere, while they get shorter for those in the northern hemisphere. Between December 21st and June 21st, the days get longer for those in the northern hemisphere and shorter for those in the southern hemisphere.
What is the distinction of a December 21 day?
It is the winter solstice in the northern hemisphere, when the northern hemisphere is tipped furthest from the sun, resulting in the shortest amount of daylight in the year in the northern hemisphere. In the southern hemisphere, it would be the day with the longest amount of daylight.
