The benefits and necessity of sunlight for the human body is not in doubt. Any of us knows that without it existence is impossible. In winter, we all experience a more or less severe deficiency of it, which negatively affects our well-being and undermines our already unstable immunity.
What happens to daylight
With the onset of the cold season, daylight hours, the duration of which is rapidly decreasing, are increasingly giving way to rights. The nights are getting longer and longer, and the days, on the contrary, are getting shorter. After the winter equinox period, the situation begins to change in the opposite direction, which most of us look forward to. Many people want to accurately navigate the length of daylight hours at the present time and in the near future.
As you know, the number of light hours per day begins to increase after the end of the period of the so-called winter solstice. At its peak, daylight hours are recorded annually, the duration of which is the shortest. From a scientific point of view, the explanation is that the sun is at this time at the most distant point in the orbit of our planet. This is influenced by the elliptical (that is, elongated) shape of the orbit.
In the northern hemisphere, it happens in December and falls on the 21st-22nd. A slight shift in this date depends on the dynamics of the Moon and shifts in leap years. At the same time, the southern hemisphere experiences the reverse period of the summer solstice.
Light day: duration, timing
A few days before and after the date of each solstice, the daylight does not change its position. Only two or three days after the end of the darkest day, the light gap begins to gradually increase. Moreover, at first this process is practically invisible, since the addition occurs only for a few minutes a day. In the future, it begins to brighten faster, this is explained by an increase in the speed of solar rotation.
In fact, the increase in the length of daylight hours in the northern hemisphere of the Earth begins no earlier than December 24-25, and it occurs until the very date of the summer solstice. This day alternately falls on one of three: from 20 to 22 June. The increase in daylight hours has a noticeable positive effect on people's health.
According to astronomers, the winter solstice is the moment when the sun reaches its lowest angular height above the horizon. After it, for a few, it can begin its sunrise even a little later (for several minutes). An increase in the duration of daylight hours is observed in the evenings and occurs due to an increasingly late sunset.
Why does it happen
This effect is also explained by an increase in the speed of the Earth. You can verify this by looking at the table, which reflects the sunrise and sunset. As astronomers say, the day is added in the evening, but unevenly on both sides. The graph of daylight hours gives a visual representation of the dynamics of this process.
Every day the sunset shifts by a few minutes. Accurate data is easy to follow on the relevant tables and calendars. As scientists explain, this effect is caused by a combination of daily and annual movements of the sun across the sky, which is a little faster in winter than in summer. In turn, this is due to the fact that, turning at a constant speed around its own axis, the Earth in winter is located closer to the Sun and moves in orbit around it a little faster.
The elliptical orbit along which our planet moves has a pronounced eccentricity. This term refers to the amount of elongation of the ellipse. The point of this eccentricity closest to the Sun is called perihelion, and the most distant point is called aphelion.
It is argued that a body moving in an elliptical orbit is characterized by maximum speed at those points that are as close as possible to the center. That is why the movement of the sun across the sky in winter is slightly faster than in summer.
How does the Earth's orbital motion affect climate?
According to astronomers, the Earth passes the point of perhelion approximately on January 3, and aphelion - on July 3. It is possible to change these dates by 1-2 days, which is associated with the additional influence of the movement of the moon.
The elliptical shape of the Earth's orbit also affects the climate. During the winter in the Northern Hemisphere, our planet is closer to the Sun, while in the summer it is further away. This factor makes the difference between the climatic seasons of our northern hemisphere a little less noticeable.
At the same time, this difference is more noticeable in the Southern Hemisphere. As established by scientists, one revolution of the overhelion point occurs in about 200,000 years. That is, in about 100,000 years, the situation will change to the exact opposite. Well, let's wait and see!
Bring on the sunshine!
If we return to current problems, the most important thing for us is the fact that the emotional, mental and physical condition of the inhabitants of the Earth is improving in direct proportion to the increase in the length of daylight hours. Even a slight (for several minutes) lengthening of the day immediately after the winter solstice has a serious moral effect on people tired of the dark winter evenings.
From a medical point of view, the positive effect of sunlight on the body is due to an increase in the production of the hormone serotonin, which controls the emotions of happiness and joy. Unfortunately, in the dark, it is produced extremely poorly. That is why an increase in the duration of the light interval by influencing the emotional sphere leads to a general improvement in well-being and strengthening of human immunity.
A significant role in the sensations of each of us is played by daily internal biorhythms, which are energetically tied to the alternation of day and night that has continued since the creation of the world. Scientists are confident that our nervous system can adequately work and cope with external overloads only if it regularly receives a well-defined dose of sunlight.
When the light isn't enough
If the sun's rays are not enough, the consequences can be the saddest: from regular nervous breakdowns to serious mental disorders. With an acute lack of light, a real depressive state can develop. And seasonal affective disorders, which are expressed in depression, bad mood, a general decrease in the emotional background, are observed all the time.
In addition, modern citizens are subject to another misfortune. Daylight hours, the duration of which is too short for modern urban life, require adjustment. We are talking about a huge, often excessive amount of artificial lighting, which is received by almost any resident of the metropolis. Our body, unadapted to such an amount of artificial light, is able to get confused in time and fall into a state of desynchronosis. This leads not only to a weakening of the nervous system, but also to the exacerbation of any existing chronic diseases.
What is day length
Let us now consider the concept of the length of the day, which is relevant for each of us in the first days after the winter solstice. This term refers to the period of time that lasts from sunrise to sunset, that is, the time during which our luminary is visible above the horizon.
This value is directly dependent on the solar declination and the geographical latitude of the point where it needs to be determined. At the equator, the length of the day does not change and is exactly 12 hours. This figure is borderline. For the northern hemisphere in spring and summer, the day lasts longer than 12 hours, in winter and autumn - less.
Autumn and spring equinox
The days when the length of the night coincides with the length of the day are called the days of the spring equinox, or autumn. This happens on September 23, respectively. It is clear that the longitude of the day reaches its highest figure at the time of the summer solstice, and the lowest - on the winter day.
Beyond the polar circles of each of the hemispheres, the longitude of the day goes off scale in 24 hours. We are talking about the well-known concept of the polar day. At the poles, it has a duration of as much as half a year.
The length of the day at any point in the hemisphere can be determined quite accurately using special tables containing the calculation of the length of daylight hours. Of course, this number changes daily. Sometimes, for a rough estimate, he uses such a concept as the average length of daylight hours by month. For clarity, consider these figures for the geographical point where the capital of our country is located.
Daylight hours in Moscow
In January daylight hours at the latitude of our capital average 7 hours 51 minutes. In February - 9 hours 38 minutes. In March, its duration reaches 11 hours 51 minutes, in April - 14 hours 11 minutes, in May - 16 hours 14 minutes.
During the three summer months: June, July and August - these figures are 17 hours 19 minutes, 16 hours 47 minutes and 14 hours 59 minutes. We see that June which corresponds to the summer solstice.
In autumn, daylight hours continue to decrease. In September and October, its duration is 12 hours 45 minutes and 10 hours 27 minutes, respectively. The last cold, dark months of the year - November and December - are famous for their record-breaking short bright days, the average day length of which does not exceed 8 hours 22 minutes and 7 hours 16 minutes, respectively.
In astrology, the Sun is associated with success and good luck in business. Following the simple recommendations of the solar calendar? you will be able to win over the capricious Fortune and achieve the desired goal.
Astronomical characteristic of the day
Sunset today: 21:20
Solar activity today: the probability of magnetic storms is very low and is no more than 1%. The magnetosphere is calm, which means that there will be no problems with well-being on this basis.
Interaction with the planets on June 22: the planet Mercury will acquire special strength on this day. Its influence is associated with the knowledge of the surrounding world and an increase in intelligence. This planet also governs money and trade. Therefore, it is worth listening to the advice of a financial horoscope.
What will bring good luck today:
- release from bad habits;
- conclusion of contracts;
- marriage;
- work with calculations and a computer;
- self-development and self-improvement;
- organizational matters;
- travel, especially in the mountains.
What can drive away success today:
- aimless waste of vitality and energy;
- engaging in ill-conceived projects and affairs;
- appeals to state bodies;
- low activity.
Talisman June 22- Mercury talismans help develop a quick reaction and improve memory. They are indispensable for people of mental labor and sellers, as they help to establish contact, activate mental activity and ingenuity. Talismans of Mercury give their owners mobility and are even able to strengthen the nervous system. The stones of this planet include turquoise, chrysolite and emerald. Citrine, aquamarine or topaz are perfect. You can also make yourself a tiger stone talisman, which has impressive magical properties.
Antitalisman June 22- the image of a salamander, a phoenix and a fish may not affect this day in the most favorable way. The fact is that they are associated with constellations in which Mercury is in a weak position and, accordingly, are able to weaken or distort its influence on you.
Color June 22- stop your choice on green: it is the closest to this planet and will help you enlist its support and positive influence. As an option, you can choose black or dark brown.
Solar calendar and relationships for June 22
Today is a good day for productive communication. Especially when it comes to business cooperation. In a relationship with a loved one, either some lull and recession may occur, or, conversely, events will begin to develop too rapidly. In any case, the most important rule on this day will be the following rule: in love, be sensitive and attentive to each other and do not cheat, and do not reveal all your cards to competitors. Then the day will turn out great.
Since the Full Moon has passed not so long ago, you can use the accumulated strength and energy inside you to perform a ritual from lack of money: Mercury will contribute to this. Good luck, and don't forget to press the buttons and
We will immediately answer the question of how many hours and minutes the daylight hours last on June 22, 2017. For Moscow, this is 17 hours and 34 minutes. As for other regions, it is important to take into account the time of sunrise and sunset. An interesting fact is that such a number of hours and minutes of daylight hours from June 22 is maintained until June 25 inclusive. Already by July 12, daylight hours will be reduced to 17 hours 8 minutes, and will gradually decrease more and more.
As for the duration of the time of day, it is, of course, not constant. The main astronomical laws contribute here. Cosmic time differs from Earth time, but it is not so strongly subject to changes. That is, it is relative. It turns out that how long time lasts in a day during daylight hours, on our planet it is customary to divide into two intervals. This is from 7 am to 11 pm. This is the period of activity of the largest part of the world's population. And also from 18 pm to 23 pm - this is the time that is actively used after the end of the working day.
Useful article about by name and date of birth.
About daylight hours
So, 17 hours and 34 minutes is the answer to the question of how many hours and minutes the daylight hours last on June 22, 2017. But what kind of daylight hours is this, what does it depend on and how is it formed? We propose to understand in more detail.
Daylight is the period of rotation of our planet around its axis. When one part of the planet is turned towards the sun, then during this period it will be light in the countries. On average, the duration of daylight hours is only 4507 hours during the year. But in each country at different times of the year, this duration will be different. Often in the winter time of day in our country, in particular, daylight hours are only 5 hours, but in summer it can reach up to 17 hours. June 22 is considered the longest day.
Interesting! In Tokyo, where nine hours are added to world time, the annual duration of daylight hours is 4175 hours, but in Beijing it is already 4377 hours, in Minsk it is already 4578 hours, as in Moscow (due to the last cancellation of the time transfer) .
Remember that our planet revolves around the sun in an elliptical, not a circular orbit. That is, the planet then approaches the sun, then moves away from it. To this must be added the ever-changing acceleration. Our planet reaches its maximum proximity to the sun somewhere on January 2-3, during this period it has its maximum acceleration. For the same reason, because of the rapid movement, less light hits the earth than usual during the year.
During this period, our planet does not have time to warm up. When the Earth rotates slowly and is far from the Sun, it receives more sunlight and, accordingly, the daylight hours also last longer.
Four sectors allocated in the ecliptic:
About degrees at the Spring Solstice.
90 degrees during the Summer Solstice.
180 degrees at the Autumn Solstice.
270 degrees at the Winter Solstice.
Interesting! In Moscow, as in other cities around the world, the length of daylight hours depends on the time of year. If we consider the average for the year, then it is 12 hours and 15 minutes.
The average length of daylight hours in the capital, if we consider it by months from the beginning of the year:
1. Eight hours and the same number of minutes.
2. Light day increases to 9 hours and 37 minutes.
3. There is a further increase in daylight hours to 12 hours and 15 minutes.
4. In April, daylight hours increase by another two hours and are already 14 hours and 32 minutes.
5. In May, this figure is 16 hours and 34 minutes.
6. In June, when the longest day of the year is observed, this is June 22, with an average of 17 hours and 54 minutes. That is, almost 18 hours, which is extremely long.
7. In July, gradually, but surely, the number of hours in the daylight hours is on the decline. While we are talking about minutes, it is 17 hours and 8 minutes.
8. In the last month of summer, daylight hours are already 14 hours and 45 minutes.
9. In September, daylight hours are reduced to 12 hours.
10. Next comes 10 hours and 26 minutes.
11. In November there is a reduction of another two hours, 8 hours and 45 minutes will be the average.
12. In December, the average is 7 hours and 49 minutes.
