他于1923 年出版了《奔往行星际的火箭》一书，在书中详细地描述了火箭如何克服地球引力的束缚飞往太空等一系列字宙空间飞行的基本理论。这本书原来是他为获取博士学位而写的论文，但是学位审查落第了，他委托蒙海书店，勉强自费出版。可是这本书成了畅销书，在德国意外地出现了“宇宙热”。该书被公认为是一本运用火箭进行宇宙飞行的经典著作，对后来世界航天事业的发展起到了极其重要的指导作用。1929 年出版了修订本，书名改做《宇宙航行的道路》。
First determine the basic theory of human space flight
The world's first determine the space flight basic theory of man, is a German scientist Hermann Oppelt was born in Romania (1943 to join the German nationality).
In 1923 he published a "rush to the interplanetary rocket" one book, describes in detail how to overcome the earth's gravity rocket bound to fly to space and a series of cosmic space flight of the basic theory in the book. The book originally was he for PhD and write a thesis, but the degree examination had lost, he commissioned the Meng sea bookstore, reluctantly published at his own expense.But this book became a best seller in Germany and unexpectedly "cosmic hot".The book is recognized as one of the classics of the universe using rocket flight,on the subsequent development of world aerospace industry plays a very important guiding role. Published in 1929, revised edition, the title changed to do"Cosmic Voyage road".(责任编辑：最有料)