Iphepha leGlobe

Umgama ophakathi komjikelo womhlaba ujikeleze ilanga nelanga umalunga neekhilomitha ezili-150 lezigidi (i-93 yezigidi zeekhilomitha), kwaye yenza uguquko olunye rhoqo kuma-365.2564 kuthetha usuku lwelanga, elibizwa ngokuba ngunyaka ongekho. Ngo-1990, uVoyager 1 wathwebula umfanekiso woMhlaba (amachaphaza amnyama luhlaza) ukusuka kwi-6.4 yezigidi zeekhilomitha (4 yezigidi zeekhilomitha). Uguquko lwenza ukuba ilanga libe nokuhamba okubonakalayo malunga ne-1 ° ngasempuma xa kuthelekiswa nenkwenkwezi yonke imihla, kwaye intshukumo nganye yeeyure ezili-12 ilingana nobubanzi obubonakalayo belanga okanye benyanga. Ngenxa yolu hlobo lokuhamba, umhlaba uthatha umndilili weeyure ezingama-24, olusuku lwelanga, ukugqibezela ukujikeleza okujikeleze i-axis yawo kwaye uvumele ilanga ukuba lidlule esibhakabhakeni kwakhona. Isantya esiphakathi soguquko lomhlaba lumalunga ne-29.8 km / s (107000 km / h), kwaye inokuhamba i-12,742 km (7,918 mi) ngaphakathi kwemizuzu esi-7, elingana nobubanzi bomhlaba; inokuhamba malunga neekhilomitha ezingama-384,000 malunga neeyure eziyi-3.5. Umgama phakathi komhlaba nenyanga. [2] Kumaxesha anamhlanje, ixesha apho i-perihelion yomhlaba kunye ne-aphelion zivela ngoJanuwari 3 noJulayi 4, ngokulandelelana. Ngenxa yeziphumo zotshintsho kulungelelwaniso kunye neparbital parameter, le mihla mibini iya kutshintsha ngokuhamba kwexesha. Olu tshintsho luneempawu ezijikelezayo, ezingumbono weMilankovitch. Utshintsho kumgama phakathi komhlaba nelanga lubangela amandla elanga afunyenwe ngumhlaba ukusuka kwi-aphelion ukuya kwi-perihelion ukuba inyuke nge-6.9%. Ngenxa yokuba i-hemisphere esemazantsi ihlala ijongene nelanga ngaxeshanye minyaka le xa ikufutshane ne-perihelion, i-hemisphere esemazantsi ifumana amandla elanga athe kratya kunaleyo yasemantla ebudeni bonyaka. Nangona kunjalo, le mpembelelo incinci kakhulu kunefuthe lokujikeleza kwe-axis ethambekele kutshintsho lwamandla ewonke. Uninzi lwamandla afunyenweyo lutsalwa ngamanzi olwandle, anika indawo ephezulu kumazantsi e-hemisphere.