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Download "6. Видимое движение Солнца"

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Мореходная астрономия
Солнце
Земля
Эклиптика
Astronomy (Field Of Study)
Sun (Celestial Object With Coordinate System)
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00:00:01
Lesson 6: visible motion of the sun,
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in addition to rotating around its axis, the earth,
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like all planets, revolves in an
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elliptical orbit around the sun,
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close to a circle, and in nautical
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astronomy it is taken to be a circle at an
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average distance of one
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astronomical unit of
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149 and 6 million kilometers, the
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orbital speed is uneven but for
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our purposes the average
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orbital speed is assumed to be uniformly 29 and 7
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6 hundred kilometers seconds,
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which is considerable; the earth happens near the
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equinox points; the planet rotates in the same
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direction as the daily rotation,
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that is, from west to east
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counterclockwise, so the movement of the
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celestial sphere in real life occurs
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clockwise
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[music ] the
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earth's axis Fedor is favorably inclined to the
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orbital plane at an angle of 66 half
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degrees and maintains this angle during the
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rotation process, that is, the north pole will
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always be directed to the polar star,
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by the way, not the brightest star of
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Ursa Minor, this is just luck for the field of the
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river, any other could have been in its place
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star
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ecliptic calls the large circle of the
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celestial sphere along which the
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visible annual movement of the sun occurs; in fact,
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this is the orbit of the earth and on the celestial sphere
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represents its projection; simply to
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solve our astronomical problems, it is
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easier to imagine this movement through the
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annual movement of the sun; the ecliptic is
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applied to the sphere according to the coordinates of the sun, the
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stellar addition of declination as it
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is done on a star globe or map, the
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easiest way is to apply a clip to the current at the angle of
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inclination e equal to 23 degrees 27 minutes,
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then simply 23 and a half degrees,
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as I do this, this angle is nothing more than the
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maximum declination of the sun,
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so the observers formed at a point on
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the meridian will be points
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solstice of
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Cancer and Capricorn and the points of intersection of the clip
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tekke with the celestial equator are the points of the
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spring or March equinox. full of
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autumn or September. Libra, I
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rotate the celestial sphere to a latitude of 45
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degrees, but this is a temperate zone and I will
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show the movement of the sun in the temperate
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zone, I begin the annual daily
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movements of the sun from the point of Aries, this is
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approximately March 21, 24, why I
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will tell you approximately later, the daily parallel, the sun,
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under the influence of its annual movement, is
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continuously shifting per declination step
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so that the overall movement on the sphere
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occurs in a spiral, that is, the spiral is the
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result of the summation of the daily and
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annual dash the sun started in March in
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the spring, our latitude is 40 50 declination from the
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same name northern and it is growing,
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bringing us closer to summer, the sun has just
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moved from the southern to the northern hemisphere and
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will quickly increase its northern declination
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by a declination step of approximately 15 minutes a day
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and will increase until it
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reaches its maximum value of
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23 and a half degrees nord. I want to note
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that this step of change in delta declination
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at the Aries-Libra equinox is greatest at
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about 15 minutes a day and at
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the solstice where the sun slows down
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its movement along the ecliptic to a minimum of
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about one tenth of a minute per day and
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the sun at this time does not change its
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midday altitude, that is, as if standing
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from here, these points are called solstice
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and so the sun has reached the summer
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solstice point point ra where the luminary has
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the greatest northern declination of the sun
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for about four days it stands
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making its daily fork along the
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kurako path without changes, almost without changes in
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mastering after the sleep state, the
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declination should be reduced, first in small
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steps, then increasing the step in reduction
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to 15 minutes per day and the long summer
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day begins to decrease until
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day and night will not be equal, this will
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continue until the sun
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reaches the point of the scales of the autumn or
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September equinox and on the entire
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globe except the poles, day is
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approximately equal to night hence
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the name here daily parallels the
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luminary coincides with the celestial equator
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solar declination is again equal to zero upon
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passage Libra the sun crosses the
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southern hemisphere, that is, it changes its
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declination in the southern and northern hemispheres,
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the day continues to kill and in the southern
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bloat it arrives, this will continue
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until the sun
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reaches its greatest southern
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declination on about December 22nd 23 and a half zey points of
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Capricorn winter solstice points
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the sun again over the course of four days,
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its daily movements will rotate
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along the extreme southern parallel, which on the
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celestial sphere is called the southern
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tropic or tropic of Capricorn, tropics
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capricorn in the northern hemisphere, winter and the
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shortest day in the southern hemisphere, on the contrary, at the
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height of summer and the longest day, the
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algorithm for the movement of the sun is preserved, that
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is, the declination remains approximately
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unchanged and at its greatest for about 4 days it
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will then begin to decrease and
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after about 3 months 21 March 24 the luminary
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will again come to the point of the spring March
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equinox again day is equal to night
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Spain 0 the sun moves to the northern
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hemisphere where spring begins the table in the upper
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left represents the main points of the
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ecliptic seasons from the point of view of
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astronomy, it changes with the passage of
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each point, for example, quite in the northern
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hemisphere it begins when the
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sun passes the point of Aries and ends on
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July 22 at the point of the summer solstice,
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summer begins, and so on in the southern
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hemisphere, it’s the other way around latitude 45 north,
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which 45 is located approximately in the middle of the
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temperate zone, which is demarcated by the
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tropics and the polar circles, that is,
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lies between latitudes 23 and a half
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degrees and 66 half degrees,
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respectively,
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the sun always rises and sets throughout the year
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and the length of the day
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varies widely
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in this zone the sun never passes
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through the winter and the meridional altitudes
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change within one year by 26
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degrees maximum belt of spheres
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located 8 degrees on either
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side of the ecliptic is called the belt
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or circle of the zodiac it passes through
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twelve constellations this is Aries Taurus Gemini
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Cancer Leo Virgo Libra Scorpio
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Sagittarius Capricorn Aquarius Pisces each of this
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constellation the sun passes about a month and
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hence the indications of the location of the sun
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behind, for example, the sun in Capricorn,
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for example, the declination of the sun is such that
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the sun passes the arc of the ecliptic on
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which this zodiacal
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constellation is projected from December 22 to January 20, the
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zodiac month begins in the
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twenties and ends in the twenties,
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in contrast to the calendar
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month, let's look at how
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joint daily allowances occur annual movement of the
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sun when the latitude of a place changes, I
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place the observer on the equator where
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all the parallels of the sun are divided in half,
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so the day is always close and equal to the night the
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days of the equinoxes when the declination is
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zero the sun moves along the equator which
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coincides here with the first vertical
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noon the sun passes through and not until
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noon the sun moves according to the rest of part
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1 Vertyakova in the afternoon according to the messenger, that
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is, noon the azimuth on the veins changes
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180 degrees downward from the state when the
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declination will be maximum 23 and a
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half degrees mink the illusion the extreme
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parallels are the tropics and about
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four days, as I already said, the sun
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will be at its zenith this happens once per year for
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each tropico the length of the day
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during the year varies little the sun can
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cross 1 vertical when the declination is
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less than latitude and does not cross it in the
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tropics change and azimuth occurs
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very unevenly large near the
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culmination and little about 1 vertical
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I move observers to the north pole of the
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extreme parallel at which it is possible
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the sun not setting or not rising
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is caused by the polar circles in the northern
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it is 66 degrees 33 minutes north in the south it is
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66 degrees 33 minutes it therefore 2
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cold zones extend from the polar
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circles two poles the polar zone in
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this example behind the northern polar
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it will be observed a non-setting sun
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and conditions when the declination is greater than or
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equal to the difference 90 minus the latitude and and the
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declination is northern of the same name, that is,
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nor giving will be polar day and polar
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night begins when the declination
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changes sign to minus will be southern
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opposite inch at the poles
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polar day and night and lasts
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almost half a year at the north pole
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polar day from March 21 to September 23
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the sun in its daily fugue rotates
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low above the horizon almost without warming up the
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permafrost polar polar night
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from September 23 to March 21 the sun
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does not rise at all at the south pole everything
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happens exactly the opposite I
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mean the date is the polar circles as well the
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tropics are marked on all globes and maps;
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the division of the earth into climatic zones
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is associated with the amount of heat received
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from the sun; in general, this is the result of the tilt of the
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earth's axis; uneven heating with the
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temperate zone, we are already familiar with the
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astronomical point of view, the earth
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is divided into 5 climatic zones; the
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hot or tropical zone includes
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regions in which the sun can pass
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through the zenith, provided that it passes through the
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zenith when the declination is equal to the latitude,
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therefore the boundaries of the belt will be
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parallels 23 and a half north or angry,
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that is, the Tropic of Cancer or Capricorn, the
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cold or polar belt, the Arctic
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Antarctic include areas in which
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the bottom is possible without setting or converging
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[ music]
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period of the sun's movement along the ecliptic,
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as for the annual movement of the sun, that
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is, movement along the ecliptic, the sun
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moves every day a little less than a degree
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to the east counterclockwise, so
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if on a given day the sun started at the
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same longitude, then after one revolution of the sphere
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relative to the star, that is, sidereal
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day the sun will travel along the ecliptic in
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its annual movement about one
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degree, or more precisely three minutes 56 seconds, this is
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exactly how much it takes for the sun to
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reach its longitude in its daily movement,
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that is, a solar day for three
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minutes 57 seconds, about 4 minutes, and this is
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one degree long-lasting stars
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are called a tropical year the period of
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time between two successive
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passages of the center of the sun through a point
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on an average tropical year is
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365 and two tenths of a day 365 days 5 hours
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48 minutes 46 seconds since we live by the
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sun, you have a solar calendar, then
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this period is the basis of the
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calendar year of
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365 days for this to align the 6-
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hour shift in the calendar, a leap
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year is every fourth goal
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which is equal to 366 days, one
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additional day is added in February, therefore the
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dates and times of the equinoxes and
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solstices
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vary from year to year and are close approximately
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every eight years, we summarize
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the information on the sun with the ecliptic, the
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earth’s orbit, aka visible annual movement of the
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sun, a large circle on the celestial sphere with an
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inclination of 23 and a half degrees to the
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plane of the equator, along it is applied to
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the sphere and this circle is constantly applied to the
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stellar globe due to the tilt of the
00:12:23
earth's axis, we have a constantly changing
00:12:25
declination of the sun throughout the year,
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accordingly changing the
00:12:29
length of the day, uneven
00:12:32
heating the planet is determined by
00:12:34
climate zones, seasons and their
00:12:37
changes, climate zones, polar
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tropical circles, plotted on all
00:12:42
maps and globes, climate directly depends
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on the heat received, that is, the height of the
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star to the horizon, the
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most important points, that is, the position of the sun, the
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equinox.
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exactly 20 March 24th. temple 20 December 24
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they lie in antiphase at an angle of 180
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degrees each other solstice points
00:13:06
Cancer 20 December 24 and Capricorn I 20
00:13:11
June 24 also in antiphase to each other and
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at an angle of 90 degrees to the solstice the
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height of the sun above the horizon and the length of
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the day depends on latitude and location
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observer I in the year, while approximately
00:13:26
March 21 and September 23 throughout the world, day
00:13:29
and night are equal to 12 hours; the tropical year
00:13:32
the sequential passage of the point he and
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the sun is equal to 365 days 5 hours 48
00:13:38
minutes 46 seconds; this period is the
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basis of the calendar year 6-hour
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offset in equalize and every fourth
00:13:47
leap year has 366 days

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