Momentsaftertouchdown, perseverancebeingbackitsfirstblackandwhiteimagefromtheMartiansurface, oneofthemshowingtherovershadowcastonthedesolateRockylandingsite, thespacecraft, selfguideddescentandlandingduring a complexseriesofmaneuversstandsisthemostelaborateandchallengingfeatintheannalsofroboticspaceflight.
Thelandingrepresentedtheriskiestpartof a twoyear, $2.7 billionendeavorwhoseprimaryaimistosearchforpossiblefossilizedsignsofmicrobesthatmayhaveflourishedonMarssomethreebillionyearsago.