Dhexroor ee Dhulka

Earth - meeraha keliya ee la garanayo ee caalamka halkaas oo nolosha ka jirta. Its jir lagu qiyaasay oo ku saabsan 3,5-4,5 bilyan oo sano.

Waayo, tobankii, dadka kuwaad Earth sida diyaarad dhajinta on haysa. Oo fikrad noocaas ah jiray qarniyo iyo in quruumaha kala duwan ee dunida. Si kastaba ha ahaatee, navigation, safaro dheer military, guutadii shopping siiyey cunto fikirka maskaxda ku warsan.

Waayo, markii ugu horeysay ee dhulka ku celiska ah laga soo jeediyay culimada Giriigga ee hore. In BC ee qarnigii 3aad (235 BC) Erastofen (geographer iyo astronomer) si loo ogaado dhexroorka of meeraha Earth by qorraxda at hal dhibic qaarkood, oo ku yaalla meel u dhow magaalada Alexandria. magaaladan - xarunta sayniska iyo dhaqanka ee qadiimiga Masar. qalabka qaddiimiga ah, daraasadda of Egyptologists casri ah ay soo jeedinayaan in durba BC ee Millennium 3aad Masriyiinta fikrad aad u fiican oo ka mid ah caalamka iyo Dhulka.

In solstice xagaaga (kalendarka casriga June 22) Erastofen xisaabiyo xagal ee dhacdooyinka ee qoraxda iyo hooska obelisk ah. Xogta oggolaan inuu sii ogaado gacan dhulka. In BC qarnigii 2aad Blotemigii isku dayay in uu xisaabiyo goobada ee caalamka si la mid ah.

oo dhan Falag buu la arki karo dhaqdhaqaaqa dhulka - The cirbixiyeyaasha of Qarniyadii hore ka postulates aragti geocentric yimid. In qarniyadii dhexe (9-11 cc.) Saynisyahano Central Asian ayaa sidoo kale sameeyay waxbarashada cabiraada. Waxay falanqeeyay shuqullada culimada qadiimi ah. Earth ee dhexroor waxaa loo xisaabiyaa iyo saynisyahannada Hindiya. Studies fuliyay siyaabo kala duwan, at dhibcood kala duwan ee caalamka iyo qaybaha kala duwan. Si kastaba ha ahaatee, natiijada xisaabaha soo koobin ee dhulkeenna, ka Sun, Moon ahaayeen dhow in qiimaha.

Qarnigii 16aad waxaa xoojinaya booska oo ka mid ah taageerayaasha ugu heliocentric qaab-dhismeedka caalamka oo dhan. Oo qorraxdii waxay ku - xarunta ku wareegsan oo quraxda xidiga ah iilan, ka mid ah taas oo noo Earth ma aha ugu weyn.

The dhexgalka ee dhulkeenna u Sun, Moon iyo meerayaasha kale ee caalamka oo dhan waa la dafiri karin. Waxaa la malaysan in Earth iyo Moon mar dhisay hal hay'ad ah. Laakiin, soo food leh balaayiin weyn asteriyoodh sano ka hor, Moon noqday a jirka runtan oo kala duwan. Its faa'iido agagaarka dhulkeenna waa 27 maalmood oo ku dhawaad 7 saacadood - taasi waa dhulka bishii our. waqti A intii lagu jiray dhulka daba noqonayaa qorraxda - 365 maalmood - sano Earth.

Dabcan, in ay jireen qaladaad in qarniyo-dheer qiyaastii ku soo koobin ee dhulkeenna, ayaa maanta si rasmi ah loo aqoonsan yahay dhinacyada soo socda: gacan ka mid ah Dhulka - 6378.1363 km, dhexroorka oo ka mid ah dhulka dhulbaraha - 12756, 274 km, Dhexroor of South si Cidhifka Waqooyi - 12514 km.

Dhab ahaantii, hadlaya argument meeraha, waxaa sii macquul ah in ay ku hadlaan oo ay dhexroor, maxaa yeelay Dhulka ma aha gudbikaraa kaamil ah, ciidanka wareeg ah ka dhigaysa ellipse ama geoid ah. Waa ay fududahay in xisaabiso in faraqa u dhexeeya qiimaha waa 43 km, iyo dhexroor celceliska Dhulka - 12,743.2 km.

Sidee sax yihiin tiro kuwanu? Cabir iyo caddeeyo xuduudaha dhulka sii. saynisyahano casriga ah waxaa ka shaqeeya kooxaha caalamiga ah, kuu ogolaanaya in aad si aad u hesho macluumaad ka dhibcood kala duwan ee caalamka. Sanadkii 2007, natiijooyinka cabbirka lagu daabacay in muujisay in, iyadoo sannadkii 2000 marka la barbar dhigo, dhulka dhexroor ayaa hoos u dhacay 5 milimitir. Tani macnaheedu ma ah in dhulkeenna hoos? Saas ma aha, waa caddayn in hagaagtay farsamooyinka cabbirka, isticmaalay macluumaad dheeraad ah oo buuxda oo sax ah, lagu daydo fiisikada casriga ah.

Sayidka, dhexroor celceliska Dhulka xogta ugu dambeeyay updated - 12 756 274 km.

In baaritaano dhawaan la isticmaalayo saddex dariiqo oo waaweyn:

1. The ruxruxo radio cabbirka (quasar) taas oo qaadan 70 telescopes radio ku yaalla meelo kala duwan oo dhulkeenna.
2. laser Satellite bilowda, marka meel fog ka soo pride dhulka la qiyaasi la laser ah.
3. Barnaamijyada Research GPS iyo nidaamyada satellite Doris.