[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-511567-105":59,"doc-detail-511567-en":130},{"code":4,"msg":5,"data":6},0,"success",[7,13,18,23,28,33,38,43,48,51,55],{"id":8,"doc_module":4,"doc_module_name":9,"category_name":10,"show_sort_weight":11,"slug":12},1,"Document","Story & Novel",90,"story-novel",{"id":14,"doc_module":4,"doc_module_name":9,"category_name":15,"show_sort_weight":16,"slug":17},2,"Literature",80,"literature",{"id":19,"doc_module":4,"doc_module_name":9,"category_name":20,"show_sort_weight":21,"slug":22},4,"Exam",70,"exam",{"id":24,"doc_module":4,"doc_module_name":9,"category_name":25,"show_sort_weight":26,"slug":27},5,"Comic",60,"comic",{"id":29,"doc_module":4,"doc_module_name":9,"category_name":30,"show_sort_weight":31,"slug":32},6,"Technology",50,"technology",{"id":34,"doc_module":4,"doc_module_name":9,"category_name":35,"show_sort_weight":36,"slug":37},7,"Healthcare",40,"healthcare",{"id":39,"doc_module":4,"doc_module_name":9,"category_name":40,"show_sort_weight":41,"slug":42},8,"Research & Report",30,"research-report",{"id":44,"doc_module":4,"doc_module_name":9,"category_name":45,"show_sort_weight":46,"slug":47},9,"Religion & Spirituality",20,"religion-spirituality",{"id":46,"doc_module":4,"doc_module_name":9,"category_name":49,"show_sort_weight":46,"slug":50},"World Cup","world-cup",{"id":52,"doc_module":4,"doc_module_name":9,"category_name":53,"show_sort_weight":52,"slug":54},10,"Lifestyle","lifestyle",{"id":56,"doc_module":4,"doc_module_name":9,"category_name":57,"show_sort_weight":24,"slug":58},19,"General","general",{"code":4,"msg":60,"data":61},"ok",{"site_id":62,"language":63,"slug":64,"title":65,"keywords":66,"description":67,"schema_data":68,"social_meta":123,"head_meta":125,"extra_data":127,"updated_unix":129},105,"en","the-story-of-explorer-i-ernst-stuhlinger","The Story of Explorer I - Ernst Stuhlinger","","The text presents the origins and development of NASA’s Explorer I mission through a historical narrative framed as Ernst Stuhlinger’s 1978 memorial lecture. It traces the intellectual lineage from Copernicus and Kepler’s orbital insights, to Newton’s mechanics and the cannon thought experiment, then surveys early rocketry efforts in Europe and the United States. It follows Wernher von Braun’s formative influences, his arrest after remarks in Germany, his postwar momentum in America, and the Redstone program’s pathway toward launching the first American satellite into Earth orbit.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":10,"@type":76,"position":81},"https://docshare.wps.com/document/story-novel/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/the-story-of-explorer-i-ernst-stuhlinger/511567/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/the-story-of-explorer-i-ernst-stuhlinger/511567.png","ImageObject",300,407,{"name":92,"@type":93},"Asher","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-29","2026-10-06",true,{"@type":102,"interactionType":103,"userInteractionCount":14},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What historical ideas does the lecture use to explain how Explorer I became possible?","Question",{"text":112,"@type":113},"It links Copernicus’s and Kepler’s orbital perceptions to Newton’s mechanics, then connects those foundations to the later concept that sufficiently fast, horizontal motion can achieve Earth orbit.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"How did Wernher von Braun’s early experiences shape his later work?",{"text":117,"@type":113},"The lecture describes him reading Oberth’s 1923 book at age thirteen, learning to rely on Newtonian mechanics, and becoming an assistant employed by Oberth in Berlin at eighteen.",{"name":119,"@type":110,"acceptedAnswer":120},"Why was the Redstone program important for launching a satellite?",{"text":121,"@type":113},"The text explains that Redstone development created the base rocket, while additional upper stages fired in sequence were planned to generate orbital velocity, enabling Explorer I to reach Earth orbit.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},511567,1792235162,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":8,"category_name":10,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":14,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":139,"language":140,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":141,"faqs":142,"seo_title":143,"seo_description":67,"update_tm":144,"read_time":145},687197207639,"https://ap-avatar.wpscdn.com/davatar_a8503ba1806abce46bf441b54a3ca4cd","THE SIGRY 0F LXPL.ORER I  \n# Wernher von Braun Memorial LectureNational Air and Space MuseumSmithsonian Institution,January 31,1978\n\nErnst Stuhlinger,Huntsville,Alabama  \nAithough Explorer I is mueh younger than most of us who have comehere today to celebrate its twentieth anniversary,its roots can betraced back in history much further than most of us can trace their ownpersonal roots.The story of Explorer I began at the time when sciencesucceeded in establishing a firm place in the affairs of man,almostfive hundred years ago.I am convinced that Nicolaus Copernicus,whoclearly perceived the orbital motions of the inoon around the earth,and of the planets around the sun,alsc understood that a projectiie,ir given enough velocity in a horizontal direction above the altitudeef the highest mountains,would orbit the earth.Kepler,who discoveredthe relationship between crbital velocity and distance from the centerof gravity a hundred years leter,nust also have been aware of thepossibility,at ieast in principle,to establish artificial noons.Agdin a hundred years later,Isaac Newton formulated the conditions ford man-made sate!lite on the basis of his immortal laws of mechanics.-1f you set up a Cannon on the top of a high mountait on the equator,he said,and if you shoot due east with a muzzle velocity of about 8000neters per second,tne bullet will go around the earth and hit you fronthe rear.-hether flewton anticipated that this nigh iitu2zle veiocitywuld really be obtained three hundr?d yeurs later with the help of  \nr(n:kets,is not known.Howevor,for the rocket and space picneers ofthe late nineteenth and the twentieth century,it was a familiar thoughtthat man-made rockets would one day be capable oi launching earth-  \norbiting satellites.Esnau!t-Pelterie in France,Tsander and Tsiolkovskiiin the USSR,Ganswindt and Oberth in Germany,Goddard in the UnitedStates--they all had their designs and recmnendations for satellites.Many of those who worked on rocket projects during and after World War IIundoubtedly had their minds from tine to time wander off,lured bythe siren song of space,and they compared the velocity of their rocketswith the magic nu:nber of eight kilometers per seccnd needed to achieveortit.  \nNernher von Braun had his first crbital encounter at the age ofthirteen after he had bought Oberth's famous book \"Rocket Flight toInterplanetary Space,\"published in 1923.A1though he was discouragedand dismayed by the jungle of mathenatics in that book,he graspedthe logic of Newtonian mechanics;Le also realized that if he ever wantedto understand more of the mysteries of space flight,he had to do hishoework in mathematics.  In 1930,when he was eighteen years old,Professor Oberth employed him as an assistant in the city of Berlin.Young Kernher helped with an exhibition of rockets and futuristic spacevehicles;he told the visitors all about rockets,satellites,and spuceprobes,and he assured them that nidnned flights to the mioon will beconepessible in the near future.  \nTen years later,rocket development work was well underway inPeenemuende.Progress was fast,and the passibility of reaching outinto space became redl.However,the ?e    :tde Pruject was not the  \ntime or the place to think of space flight.A harinless,but imprudentremark by Dr.von Braun to the effect that rockets should rather be usedfor space flight and not for military purposes led to his arrest by theGESTAPO;it took General Dornberger,Commander of Peenemuende,two weeksto have him released from jail.Talks about satellitis and spaceflight were sim 1y taboo in Peenemuende.But,the basic laws of propulsionand guidance apply to space vehicles as well as they do to ballisticmissiles,and when Dr.von Braun arrived in the United States after thewar,a flood jate opened for all the ideas,plans,calculations,andsketches which had accumulated during previous ;nars in his restlessi2:~-ee、人，飞CLand productive mind.He talked,presented,and wroterabout giganticspace stations orbiting the earth,about","cbCainAT6Tr68AXD","https://ap.wps.com/l/cbCainAT6Tr68AXD","pdf",1051743,21,"English","# Wernher von Braun Memorial Lecture\n## Explorer I’s historical roots\n## Early orbital theory and Newton’s mechanics\n## Rocket pioneers and von Braun’s influences\n## From wartime constraints to postwar momentum\n## The Redstone guided missile and the satellite plan","[{\"question\":\"What historical ideas does the lecture use to explain how Explorer I became possible?\",\"answer\":\"It links Copernicus’s and Kepler’s orbital perceptions to Newton’s mechanics, then connects those foundations to the later concept that sufficiently fast, horizontal motion can achieve Earth orbit.\"},{\"question\":\"How did Wernher von Braun’s early experiences shape his later work?\",\"answer\":\"The lecture describes him reading Oberth’s 1923 book at age thirteen, learning to rely on Newtonian mechanics, and becoming an assistant employed by Oberth in Berlin at eighteen.\"},{\"question\":\"Why was the Redstone program important for launching a satellite?\",\"answer\":\"The text explains that Redstone development created the base rocket, while additional upper stages fired in sequence were planned to generate orbital velocity, enabling Explorer I to reach Earth orbit.\"}]","The Story of Explorer I - Ernst Stuhlinger | PDF",1791254464,32]