Messier 81 (oo sidoo kale loo yaqaano NGC 3031 ama Bode's Galaxy) waa galaxy wareeg ah oo qiyaastii 12 milyan oo sano oo iftiin ah, oo leh dhexroor ah 90,000 sano oo iftiin ah, qiyaastii kalabar cabbirka Milky Way, oo ku yaal xiddigta Ursa Major. Sababtoo ah u dhawaanshaha dhulka, cabirkeeda weyn, iyo nuqul galactic firfircoon (oo leh 70 milyan M<unk> godad madow oo aad u weyn), Messier 81 waxaa si ballaaran u bartay cilmiga cilmiga cilmiga cilmiga cilmiga cilmiga cilmiga cilmiga cilmiga cilmiga cilmiga cilmiga cilmiga cilmiga cilmiga cilmiga cilmiga cilmiga cilmiga cilmiga cilmiga cilmiga cilmiga cilmiga cilmiga.
12 milyan oo