A diamita na Duniya

Duniya - kadai a san duniya a sararin samaniya inda rayuwa ta wanzu. Its shekaru kiyasta game 3.5-4.5 shekaru biliyan.

Domin millennia, mutane zaton zace da Duniya a matsayin wani jirgin saman saka a kan wani pedestal. Kuma irin wannan ra'ayin wanzu ga ƙarni, kuma a cikin daban-daban al'ummai na duniya. Duk da haka, kewayawa, soja dogon tafiye-tafiye, shopping expeditions ba abinci domin tunani da tambayar hankali.

A karo na farko a duniya a matsayin Sphere da shawarar da tsoho Greek malamai. A karni 3rd BC (235 BC) Erastofen (geographer da falakin) domin sanin diamita na duniyarmu da rana a wani batu, dake kusa da birnin Alexandria. Wannan birni - cibiyar kimiyya da al'adu na zamanin d Misira. Archaeological kayan, da nazari na zamani Egyptologists bayar da shawarar cewa tuni a cikin 3rd Millennium BC Masarawa yana da matukar kyau ra'ayin na sararin samaniya da kuma Duniya.

A lokacin rani solstice (a cikin kalandar Yuni 22) Erastofen lissafi da kwana na abin da ya faru na hasken rana da kuma inuwa da obelisk. A data yarda da shi domin sanin radius na Duniya. A 2nd karni BC Talomi kokarin yin lissafi da karkara na duniya a irin wannan hanya.

A ilmin Taurari na tsufa ya zo daga geocentric ka'idar postulates - duk da bayyane basamaniyai motsi a kusa da Duniya. A tsakiyar zamanai (9-11 cc.) Central Asia masana kimiyya ma gudanar ji karatu. Su bincikar ayyukan tsoho malamai. Duniya ta diamita aka lasafta da kuma India masana kimiyya. Nazarin da za'ayi a cikin hanyoyi daban-daban, a daban-daban maki na duniya da kuma a cikin daban-daban raka'a. Duk da haka, sakamakon lissafin da sigogi na duniya tamu, da rãnã da watã kasance kusa a darajar.

A 16th karni shi ƙarfafa matsayin da magoya bayan na heliocentric tsarin da sararin samaniya. Rana - da cibiyar a kusa da taurari akwai doguwar, tsakanin wanda mu Duniya ba mafi girma.

The hulda da wannan duniya tamu da rãnã da watã kuma sauran duniyoyi na sararin samaniya ne undeniable. An zaci cewa Duniya da kuma Moon da zarar zarcewa guda mahaluži. Amma, da fuskantar wata babbar asteroid biliyoyin shekaru da suka wuce, da Moon ya zama mai raba cosmic jiki. Its yawa a kusa da duniya tamu 27 kwana da kuma kusan 7 hours - wannan shi ne mu duniya watan. A lokaci a lokacin da Duniya revolves a kusa da rana - 365 days - Duniya shekara.

Hakika, cewa akwai kurakurai a cikin ƙarni-dogon ma'aunai na sigogi na duniya tamu, a yau hukumance gane da wadannan girma: da radius daga cikin Duniya - 6378.1363 km. diamita daga cikin Duniya ta ekweita - 12756, 274 km. Diamita na Kudu da Arewa iyakacin duniya - 12514 km.

A gaskiya, magana na duniya sigogi, shi ne mafi ma'ana ga magana ta diamita, saboda Duniya ne ba wani cikakken Sphere, rotational karfi sa da ellipse ko geoid. Abu ne mai sauki yin lissafi da cewa bambanci tsakanin dabi'u ne 43 km, da matsakaita diamita na Duniya - 12,743.2 km.

Ta yaya daidai ne wadannan lambobin? Auna da kuma bayyana sigogi na Duniya ya ci gaba. Modern masana kimiyya suna aiki a cikin kasa da kasa teams, cewa ba ka damar samun bayanai daga daban-daban maki na duniya. A shekarar 2007, ji sakamakon da aka buga cewa, ya nuna cewa, idan aka kwatanta da shekara ta 2000, Duniya ta diamita ya rage da 5 millimeters. Shin haka yana nufin cewa mu duniya da aka ragewa? Ã'a, shi ne shaida cewa inganta ji dabaru, amfani da mafi cikakken da kuma cikakken bayani, zamani Geophysical model.

Saboda haka, matsakaita diamita na Duniya a kan latest sabunta data - 12 756 274 km.

A cikin 'yan nazarin yin amfani da uku main hanyoyin:

1. The ji rediyo kalaman (quasar) wanda kai 70 radio nesa located in sassa daban-daban na duniya tamu.
2. Tauraron Dan Adam Laser jere, a lokacin da nisa daga kumbon sama jannati zuwa ga ƙasa, da gwargwado yake tare da wata na'ura.
3. Research shirye-shirye GPS da Doris da tauraron dan adam da tsarin.