Takarda Duniya

Matsakaicin tazarar da ke tsakanin kewayar duniya da ke kewaye da rana da rana ya kai kimanin kilomita miliyan 150 (mil miliyan 93), kuma yana yin sauyi sau daya a kowace rana ta 365.2564 wacce ke nufin rana, wanda ake kira shekarar bango. A 1990, Voyager 1 ya ɗauki hoton Duniya (dige mai duhu mai duhu) daga kilomita biliyan 6.4 (mil biliyan 4). Juyin juya halin yana sanya rana samun motsi na kusan 1 ° gabas da tauraruwar kowace rana, kuma motsi kowane awa 12 yayi daidai da bayyanar diamita na rana ko wata. Saboda irin wannan motsi, duniya tana daukar awanni 24, wanda rana ce ta hasken rana, don kammala cikakkiyar juyawa a kusa da inda take kuma barin rana ta sake wucewa ta tsakiyar sama kuma. Matsakaicin gudun juyin juya halin duniya ya kai kimanin 29.8 km / s (107000 km / h), kuma yana iya tafiya kilomita 12,742 (7,918 mi) a tsakanin minti 7, wanda yayi daidai da diamita na duniya; yana iya yin tafiyar kimanin kilomita 384,000 cikin kimanin awanni 3.5. Nisan tsakanin duniya da wata. [2] A zamanin yau, lokacin da rawanin duniya da aphelion ke bayyana a ranar 3 ga Janairu da 4 ga Yuli, bi da bi. Dangane da tasirin canje-canje a cikin abubuwan da suka shafi tsari da kuma hanyoyin zagayawa, waɗannan kwanakin biyu zasu canza akan lokaci. Wannan canjin yana da fasalin zagaye, wanda shine zato na Milankovitch. Canjin da ke tsakanin tazarar da ke tsakanin duniya da rana yana sa hasken rana da ƙasa ta samu daga aphelion zuwa perihelion ya ƙaru da 6.9%. Saboda duk lokacin da kudanci yake fuskantar rana a lokaci guda a duk shekara lokacin da yake kusa da gabar, yankin na kudanci yana samun karin hasken rana dan kadan fiye da na arewa a duk shekara. Koyaya, wannan tasirin yana da ƙanƙanta sosai fiye da tasirin yanayin juyawar juyawa akan jimlar canjin kuzari. Yawancin ƙarfin da aka karɓa yana shagaltar da ruwan tekun, wanda ke ba da babban rabo na dutsen ƙasan kudu.