Nauyin dare: zane-zane na "Northern Venice"

Harshen dare sun dade suna ziyartar katin ziyartar kuma daya daga cikin abubuwan jan hankali na St. Petersburg. Wannan abu mai ban mamaki na al'ada wanda aka gani a cikin birnin a kogin Neva a kowace shekara daga Yuni 11 zuwa Yuli 2. A wannan lokaci, cibiyar watsa layin rana yana sauka a tsakar dare a ƙasa da layin sararin sama ba tare da digiri bakwai ba, wanda zai haifar da hasken haske sosai a wannan lokaci na rana.

Tarihin wannan tasiri na ban mamaki abu ne mai yawa. An lura da kusurwar dare a farkon lokacin rani a cikin ɗakunan biyu a latitudes fiye da sittin sittin. Amma a cikin zukatanmu sun dade suna zama alama ce ta St. Petersburg. A wannan lokaci gari baiyi kama barci ba, yana kallon zane-zane na yanayi. Akwai shirye-shirye masu yawa, bukukuwa, wasanni. Ana ganin dukan garin yana cikin sihiri ne na illa na halitta. A wannan lokaci, yawancin yawon bude ido sun zo nan, da taurari na kiɗa da kuma fina-finai daga ko'ina cikin duniya.

Kowace shekara a arewacin Palmyra a watan Yuni akwai wani dutsen dutse tare da alama mai mahimmanci "White Night a Petersburg". Har ila yau, a wannan lokacin, an gudanar da gasar fina-finai na kasa da kasa a nan, inda aka nuna fina-finai a cikin shekarar. Kwanakin dare na fari a cikin mafi girma a cikin babban birni na Turai ana nuna su ne ta hanyar rayuwa mai tsanani da tsanani. Wannan hutu ne na biki, wanda aka gabatar ta yanayi, wanda kuma shi ne daya daga cikin bazaran yawon shakatawa na birnin a kan Neva. Ikilisiyar St. Isaac a wani dare mai duhu yana da ban sha'awa sosai.

Menene wannan abin mamaki daga ra'ayi na astronomical kuma menene tsarin aikinta? Kalmar "fari dare" a nuna a fakaice da ingantaccen halaye na almuru, wanda shi ne peculiar zuwa high isa matakin na halitta haske. A gaskiya, a lokaci kusa da bazara solstice a arewacin yammancin duniya, da shafaƙi rufe sama da safe. Tsarin motsi na duniyarmu a cikin rufinta yana hade da canji a cikin kusurwar haɓakar ƙasa ta hanyar wasu digiri. Wannan results a cikin motsi na da Arewa iyakacin duniya zuwa batu na perihelion, wanda yana tare da ma perpendicular zuwa rana ta haskoki a duniya ta surface a iyakacin duniya yankuna. Wannan yana haifar da irin wannan tasiri, wanda ya zama amfani da shi azaman "farin dare".

Irin wannan yanayi a Rasha shine hali ba kawai ga St. Petersburg ba, har ma ga Murmansk, Norilsk, Vorkuta, Cherepovets, Vologda, Magadan, Nizhnevartovsk, Khanty-Mansiysk, Nefteyugansk, Surgut, Yakutsk, Arkhangelsk da sauran ƙauyuka da yankuna zuwa arewa Sixtieth a layi daya. Bugu da kari, wannan sakamako da aka lura a latitudes kusa ekweita, wanda aka sa ta fall na da Tunguska meteorite. Bayan haka, a ƙasashen ƙasashen Turai da yawa a Rasha akwai yiwuwar lura da irin abubuwan da suke gani, wadanda ake kira haske mai haske da kuma fararen dare, wanda basu da cikakkun bayanai ga waɗannan yankuna.

A waje da Rasha, wannan mahimmanci ma ba haka ba ne. Alal misali, Finland, misali, ana la'akari da ƙarshen farin dare. Har ila yau, wannan yanayin na al'ada yana da halayyar arewacin Sweden, Iceland, Norway, yankunan polar Kanada, Greenland har ma Estonia. A Birtaniya, da fari dare za a iya gani a cikin Kirkwall Islands.