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Mstari 1: [[Picha:The Blue Marble.jpg\|thumbnail\|260px\|Ardhi]] '''Dunia''' (wakati mwingine pia: '''ardhi''') ni [[gimba la angani]] tunapoishi. Ni mojawapo ya [[sayari]] zinazotembea katika [[anga]] la ulimwengu\|anga ya [[ulimwengu]]. Kuna sayari nane zinazolizunguka [[jua]], dunia yetu ikiwa sayari ya tatu katika [[mfumo wa jua na sayari zake]]. Masafa baina yake na jua ni kilomita milioni 150 au [[kizio astronomia]] 1. Dunia huchukua siku 365.256 kulizunguka jua, na masaa 23.9345 kuuzunguka mhimili wake na upana wake ni kilomita 12,756. Dunia huwa na [[mwezi (gimba la angani)\|mwezi]] 1. Umri wa dunia hukadiriwa kuwa miaka bilioni 4.5<ref><nowiki>[http://sp.lyellcollection.org/content/190/1/205.abstract G. Brent Dalrymple: The age of the Earth in the twentieth century: a problem (mostly) solved, The Geological Society of London 2001]</nowiki> ~~Dunia huwa na [[mwezi (gimba la angani)\|mwezi]] 1.~~ </ref><ref>[http://www.talkorigins.org/faqs/faq-age-of-earth.html Chris Stassen, The Age of the Earth, (The Talk Origins Archive, 2005) </ref>. Ni mahali pa pekee katika [[ulimwengu]] panapojulikana kuna [[uhai]] ulioaminiwa kuanza miaka bilioni 3.5 iliyopita<ref>Schopf, JW, Kudryavtsev, AB, Czaja, AD, and Tripathi, AB. (2007). ''Evidence of Archean life: Stromatolites and microfossils.'' Precambrian Research 158:141–155.</ref>. Uhai unapatikana kwa spishi milioni 10-14 za viumbehai pamoja na wanadamu waliokadiriwa kuwa bilioni 7.2<ref>http://www.worldometers.info/world-population/</ref>. == Muundo wa dunia ==

Dunia : Tofauti kati ya masahihisho