▁Est onia ▁Nan j ing , ▁Ji ang su , ▁China ▁ ▁Science ▁and ▁technology ▁N ano jou le ▁( n J ), ▁an ▁International ▁System ▁of ▁Units ▁( SI ) ▁unit ▁of ▁energy ▁equal ▁to ▁ 1 0 − 9 ▁jou les ▁Ne igh bor ▁joining , ▁a ▁bio in form atic ▁method ▁for ▁the ▁construction ▁of ▁ph y log en etic ▁trees ▁ ▁Other ▁uses ▁N j ▁( dig raph ), ▁a ▁Latin - script ▁dig raph ▁N ipp on ▁J amb ore e ▁Nord j ys ke ▁J ern ban er , ▁a ▁Dan ish ▁railway ▁Nap ier ville ▁J unction ▁Railway ▁N J . com , ▁a ▁news ▁website ▁ ▁See ▁also ▁ ▁N je , ▁a ▁letter ▁of ▁the ▁C yr ill ic ▁script <0x0A> </s> ▁" The ▁Moon ▁is ▁made ▁of ▁green ▁che ese " ▁is ▁a ▁statement ▁referring ▁to ▁a ▁f anc iful ▁belief ▁that ▁the ▁Moon ▁is ▁composed ▁of ▁che ese . ▁In ▁its ▁original ▁form ulation ▁as ▁a ▁pro verb ▁and ▁met ap hor ▁for ▁cred ul ity ▁with ▁roots ▁in ▁f able , ▁this ▁refers ▁to ▁the ▁per ception ▁of ▁a ▁simple ton ▁who ▁sees ▁a ▁reflection ▁of ▁the ▁Moon ▁in ▁water ▁and ▁mistakes ▁it ▁for ▁a ▁round ▁che ese ▁wheel . ▁It ▁is ▁w ides p read ▁as ▁a ▁folk lor ic ▁mot if ▁among ▁many ▁of ▁the ▁world ' s ▁cult ures , ▁and ▁the ▁notion ▁has ▁also ▁found ▁its ▁way ▁into ▁children ' s ▁fol kl ore ▁and ▁modern ▁popular