Wani gefen wata
Daya gefen wata yana haskakawa da Rana daidai da abin da ake kira kwas, kawai ba za ka iya ganinsa daga ƙasa ba. Daga duniyarmu yana yiwuwa a lura da jimlar (amma ba lokaci guda ba!) 59% na saman wata, da kuma sanin sauran 41%, na abin da ake kira reverse side, yana yiwuwa ne kawai ta amfani da binciken sararin samaniya. Kuma ba za ka iya ganinsa ba, domin lokacin da wata zai yi yana jujjuyawa a kusurwoyinsa daidai yake da jujjuyawarsa a doron kasa.
Idan wata bai zagaya a kusurwoyinsa ba, to sai a nuna K (wani wurin da muka zaba a fuskar wata), wanda da farko ana iya gani a tsakiyar fuskar, zai kasance a gefen wata a cikin mako guda. A halin yanzu, wata, yana yin rubu'in juyin juya hali a duniya, a lokaci guda yana juya rubu'in juyi a kusa da axis, don haka ma'anar K yana cikin tsakiyar diski. Don haka, a kowane matsayi na wata, maki K zai kasance a tsakiyar faifan daidai saboda wata, yana kewaya duniya a wani kusurwa, yana jujjuya kansa a kusurwa guda.
Motsi biyun, jujjuyawar wata da motsinsa a cikin duniya, sun kasance masu cin gashin kansu gaba daya kuma suna da lokaci guda. Masana kimiyya sun nuna cewa wannan daidaitawar ya samo asali ne saboda tsananin tasirin da Duniya ke yi akan wata sama da shekaru biliyan da dama. Guguwar ruwa tana hana jujjuyawar kowane jiki, don haka su ma suka rage jujjuyawar wata har sai da ya zo daidai da lokacin da ya yi juyin juya hali a duniya. A cikin wannan yanayi, igiyar ruwa ta daina yaɗuwa a saman duniyar wata, don haka gogaggun da ke hana jujjuyawarta ya ɓace. Hakazalika, amma da kadan, igiyoyin ruwa suna rage saurin jujjuyawar da duniya ke yi, wanda a da ya kamata a ce ta yi sauri fiye da yadda take a yanzu.
Rana
Duk da haka, da yake yawan duniya ya fi na wata girma, yawan jujjuyawar duniya ya ragu sosai. Watakila, a nan gaba mai nisa, jujjuyawar duniya zai yi tsayi sosai kuma zai kasance kusa da lokacin juyin juya halin wata a duniya. Duk da haka, masana kimiyya a Cibiyar Fasaha ta Massachusetts sun yi imanin cewa wata ya fara motsawa a cikin elliptical, maimakon madauwari, yana kewayawa tare da resonance daidai da 3: 2, watau. ga kowane juyi guda biyu na kewayawa, akwai juyi guda uku a kusa da gadarsa.
A cewar masu binciken, ya kamata wannan jihar ta dau shekaru miliyan dari kacal kafin magudanar ruwa su rage jujjuyawar wata zuwa da'ira na 1:1 na yanzu. Bangaren da a kodayaushe yake fuskantar Duniya ya sha bamban a kamanni da siffa daga wancan bangaren. Ƙunƙarar da ke gefen kusa ya fi sirara sosai, tare da faffadan filaye na basalt duhu mai tsayi da ake kira maria. Gefen wata, wanda ba a iya ganinsa daga doron ƙasa, an rufe shi da wani ɓawon burodi mai kauri mai yawa tare da ramuka masu yawa, amma akwai kaɗan a cikinsa.
