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  • https://ukrayinska.libretexts.org/%D1%84%D1%96%D0%B7%D0%B8%D0%BA%D0%B8/%D0%9A%D0%BB%D0%B0%D1%81%D0%B8%D1%87%D0%BD%D0%B0_%D0%BC%D0%B5%D1%85%D0%B0%D0%BD%D1%96%D0%BA%D0%B0/%D0%9A%D0%BB%D0%B0%D1%81%D0%B8%D1%87%D0%BD%D0%B0_%D0%BC%D0%B5%D1%85%D0%B0%D0%BD%D1%96%D0%BA%D0%B0_(Dourmashkin)/25%3A_%D0%9D%D0%B5%D0%B1%D0%B5%D1%81%D0%BD%D0%B0_%D0%BC%D0%B5%D1%85%D0%B0%D0%BD%D1%96%D0%BA%D0%B0/25.06%3A_%D0%97%D0%B0%D0%BA%D0%BE%D0%BD%D0%B8_%D0%9A%D0%B5%D0%BF%D0%BB%D0%B5%D1%80%D0%B0
    ΔA=12(rΔθ)r+(rΔθ)2Δr \[\Delta A=\frac{1}{2} \frac{(r \Delta \theta) r}{\Delta t}+\frac{(r \Delta \theta)}{2} \frac{\Delta r}{\Del...ΔA=12(rΔθ)r+(rΔθ)2Δr ΔA=12(rΔθ)rΔt+(rΔθ)2ΔrΔt dAdt=12r2dθdt Період обертання T планети навколо Сонця пов'язаний з напіввеликою віссю a еліпса тим,T2=ka3 де k однаковий для всіх планет. orbit 2μdA=T0Ldt