Ekuinoks: Pabidaan ralatan

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'''Ekuinoks''' marupakan fenomena pas [[ekuator langit]] lawan [[ekuator]] [[bumi]] malewati pusat geometris matan cakram [[matahari]].<ref name="USNO FAQ">{{cite web |url=https://aa.usno.navy.mil/faq/docs/equinoxes.php |title=Equinoxes |date=14 June 2019 |work=Astronomical Information Center |publisher=[[United States Naval Observatory]] |archive-url=https://web.archive.org/web/20190525103847/https://aa.usno.navy.mil/faq/docs/equinoxes.php|archive-date=25 May 2019 |url-status=live |access-date=9 July 2019 |quote=On the day of an equinox, the geometric center of the Sun's disk crosses the equator, and this point is above the horizon for 12&nbsp;hours everywhere on the Earth. However, the Sun is not simply a geometric point. Sunrise is defined as the instant when the leading edge of the Sun's disk becomes visible on the horizon, whereas sunset is the instant when the trailing edge of the disk disappears below the horizon. These are the moments of first and last direct sunlight. At these times the center of the disk is below the horizon. Furthermore, atmospheric refraction causes the Sun's disk to appear higher in the sky than it would if the Earth had no atmosphere. Thus, in the morning the upper edge of the disk is visible for several minutes before the geometric edge of the disk reaches the horizon. Similarly, in the evening the upper edge of the disk disappears several minutes after the geometric disk has passed below the horizon. The times of sunrise and sunset in almanacs are calculated for the normal atmospheric refraction of 34&nbsp;minutes of arc and a [[semidiameter]] of 16&nbsp;minutes of arc for the disk. Therefore, at the tabulated time the geometric center of the Sun is actually 50&nbsp;minutes of arc below a regular and unobstructed horizon for an observer on the surface of the Earth in a level region}}</ref><ref>{{cite web |url=https://www.esrl.noaa.gov/gmd/grad/solcalc/glossary.html#equinox |title=ESRL Global Monitoring Division - Global Radiation Group |publisher=U.S. Department of Commerce |department=[[NOAA]] |website=www.esrl.noaa.gov |language=EN-US |access-date=9 July 2019}}</ref> Fenomena ngini tajadi dua kali satiap tahunnya, yaitu, pas sakitar [[Ekuinoks Maret|20 Maret]] wan [[Ekuinoks September|23 September]]. Kawa disambat, bahwa kajadian ngini marupakan fenomena haratan tangah matahari kawa taitihi baandak [[Zenit|pas di atas ekuator]]
 
Kata ekuinoks diambil matan basa [[Latin]] ''{{lang|la|aequinoctium}}'', nang baasal matan kata ''{{lang|la|aequus}}'' (equal)nang andartinya sama wan ''{{lang|la|nox}}'' ([[genitivekasus casegenitif|genitivegenitif]] ''{{lang|la|noctis}}'') (night).nang Onbaisi thearti daymalam. ofPas anharinya equinoxekuinoks cungul, daytimesiang andwan nighttimemalam arewaktunya ofsama approximatelydi equalsabarataan durationwilayah alldi over the planetBumi. TheyTapi arekada notsabarataan exactlyjua equalsama, however,hal duengini to themaraga [[angulardiameter diameterbuncu|angularukuran sizebuncu]] of the Sunmatahari, [[atmosphericrefraksi refractionatmosfir]], andwan thepaubahan rapidlyhancap changinghari durationnang ofcungul thedi lengthkabanyakan ofdi daygaris thatlintang occursparak atekuinoks. most latitudes around the equinoxes.Jauh Longsabalum beforeparsamaan conceivingnang thisngini equalityditamuakan, primitivebudaya equatorialekuator culturesprimitif notedsudah themancatat dayhari whenapa thehaja SunMatahari risescungul duedi [[easttimur]] andwan setstinggalam duedi [[westbarat]], andwan indeedkajadian thisngini happensdasar onparak thebanar daylawan closestkajadiakan tonang theditantuakan astronomicallysacara defined eventastronomis. As a consequenceAkibatnya, accordingmanurut to[[jam amatahari]] properlynang constructeddiulah andwan aligneddiatur [[sundial]]bujur-bujur, the daytimesiang durationhari iswaktunya 12 hoursjam.
 
In the [[Northern Hemisphere]], the [[March equinox]] is called the vernal or spring equinox while the [[September equinox]] is called the autumnal or fall equinox. In the [[Southern Hemisphere]], the reverse is true. The dates slightly vary due to [[leap year]]s and other factors.
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