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Analytics Analytics. Analytical cookies are used to understand how visitors interact with the website. Instead, the axis is tilted slightly, at This tilt is always pointed in the same direction in space, toward Polaris the so-called North Star , even as the planet travels in a circle around the sun.
Depending on where you are on the planet, the difference in the length of the day from season to season can be larger or smaller. Higher latitudes are closer to the poles, while 0 degrees in latitude is the equator itself. But as the Earth is a sphere, the higher latitudes near the poles are already curving away from the Sun and therefore receiving less sunlight every 24 hours. With an extra Equinoxes and solstices are not only key dates in the calendar but also in the journey of Earth around the Sun.
They are used to outline the transitional periods between the seasons — when winter changes to spring, summer to autumn, and so on. How long days and nights are will depend on the position of the Sun in the relation to the Earth.
The equinox happens twice a year and marks the when the amount of day-time we get is equal to the amount of night time we get — the day is equal to the night. This takes place when the sun is positioned right above the equator. It happens usually around the 20th of March, which is the spring equinox , and again around the 22nd of September, known as the autumn equinox.
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To answer that, we need to talk about a bit of basic Solar System astronomy. How does Picture Earth and all of its inhabitants happily spinning like a top around its axis once per day.
Now picture that happily spinning top slowly traveling around the Sun once per year. With a bit of thought and perhaps a model made with a flashlight and ball , you should be able to convince yourself that if the axis around which the Earth spins is perfectly lined up with the axis around which it revolves around the Sun, then every location on the planet will always experience 12 hours of day and 12 hours of night—every day, all year long.
Unless you've actually been living in a cave and thus not able to see the comings and goings of day and night , you'll recognize that this doesn't sound like the Solar System we live in at all—from which we can draw the conclusion that these two axes must not actually be aligned.
Which is, in fact, true—we know that the axis about which the Earth spins is tilted about What does that do? In short, a lot. Why do daylight hours change? More specifically, for our purposes here the most important byproduct of Earth's tilted axis is the fact that the number of hours of daylight changes throughout the year—and exactly how it changes depends on the latitude at which you live.
If you think about it or take a look at that flashlight and ball model you played around with earlier , you'll see that the top half of the Earth is tilted towards the Sun for half the year and away from it for the other half. Parts of the planet tilted towards the Sun receive more than 12 hours of sunshine per day, parts pointed away from it receive less.
As the Earth travels around the Sun throughout the year, the degree to which a part of the planet is tilted towards or away from the Sun changes. And with that change comes a change in the number of daylight hours that part of the Earth receives. Parts of the planet tilted tow ards the Sun receive more than 12 hours of sunshine per day.
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