▁more ▁light ▁from ▁the ▁background ▁sky , ▁effectively ▁decre asing ▁contrast , ▁making ▁the ▁detection ▁of ▁faint ▁objects ▁more ▁difficult ▁except ▁perhaps ▁in ▁remote ▁locations ▁with ▁neg lig ible ▁light ▁poll ution . ▁Many ▁astronom ical ▁objects ▁of ▁ 8 ▁magnitude ▁or ▁br ighter , ▁such ▁as ▁the ▁star ▁clusters , ▁ne b ula e ▁and ▁galaxies ▁listed ▁in ▁the ▁Mess ier ▁Catalog , ▁are ▁readily ▁viewed ▁in ▁hand - h eld ▁bin oc ular s ▁in ▁the ▁ 3 5 ▁to ▁ 4 0   mm ▁range , ▁as ▁are ▁found ▁in ▁many ▁households ▁for ▁bird ing , ▁hunting , ▁and ▁view ing ▁sports ▁events . ▁For ▁obser ving ▁smaller ▁star ▁clusters , ▁ne b ula e , ▁and ▁galaxies ▁bin oc ular ▁magn ification ▁is ▁an ▁important ▁factor ▁for ▁visibility ▁because ▁these ▁objects ▁appear ▁tiny ▁at ▁typical ▁bin oc ular ▁magn ifications . ▁▁ ▁Some ▁open ▁clusters , ▁such ▁as ▁the ▁bright ▁double ▁cluster ▁( N GC ▁ 8 6 9 ▁and ▁NGC ▁ 8 8 4 ) ▁in ▁the ▁const ell ation ▁Per se us , ▁and ▁glob ular ▁clusters , ▁such ▁as ▁M 1 3 ▁in ▁Her cules , ▁are ▁easy ▁to ▁spot . ▁Among ▁ne b ula e , ▁M 1 7 ▁in ▁S ag itt arius ▁and ▁the ▁North ▁America ▁Neb ula ▁( N GC ▁ 7 0 0 0 ) ▁in ▁C yg n us ▁are ▁also ▁readily ▁viewed . ▁Bin oc ular s ▁can ▁show ▁a ▁few ▁of ▁the ▁wider - split ▁binary ▁stars ▁such