Soviet space program
Further notable records included the first interplanetary probes: Venera 1 and Mars 1 to fly by Venus and Mars , respectively , Venera 3 and Mars 2 to impact the respective planet surface , and Venera 7 and Mars 3 to make soft landings on these planets . 
<triplet> Venera 1 <subj> interplanetary probe <obj> instance of <triplet> Mars 2 <subj> interplanetary probe <obj> instance of <subj> Mars <obj> parent astronomical body <triplet> Venera 7 <subj> interplanetary probe <obj> instance of <triplet> Mars 3 <subj> interplanetary probe <obj> instance of <subj> Mars <obj> parent astronomical body