The Exploration of Space |
Din interiorul cărții
Rezultatele 1 - 3 din 57
Pagina 49
Quite a small change in speed will alter its path from a circular one into an ellipse grazing the atmosphere . As it cuts through the upper atmosphere , air resistance will reduce its speed still further and , in the process , it will ...
Quite a small change in speed will alter its path from a circular one into an ellipse grazing the atmosphere . As it cuts through the upper atmosphere , air resistance will reduce its speed still further and , in the process , it will ...
Pagina 50
On its first contact , the ship would stay inside the atmosphere for only a few minutes before whipping out into space again . Because of the loss in speed , however , the next encounter would take it into deeper layers , and eventually ...
On its first contact , the ship would stay inside the atmosphere for only a few minutes before whipping out into space again . Because of the loss in speed , however , the next encounter would take it into deeper layers , and eventually ...
Pagina 144
Of course , our present - day internal - combustion engines would be useless in the inert atmospheres of these ... and the surrounding atmosphere will be used merely as the “ working fluid ” , taking no part in any chemical reaction .
Of course , our present - day internal - combustion engines would be useless in the inert atmospheres of these ... and the surrounding atmosphere will be used merely as the “ working fluid ” , taking no part in any chemical reaction .
Ce spun oamenii - Scrie o recenzie
Nu am găsit nicio recenzie în locurile obișnuite.
Cuprins
THE SHAPING OF THE DREAM | 1 |
THE EARTH AND ITS NEIGHBOURS | 9 |
THE ROCKET | 17 |
Drept de autor | |
17 alte secțiuni nu sunt arătate
Alte ediții - Afișează-le pe toate
Termeni și expresii frecvente
able acceleration actual already appear astronautics astronomers atmosphere atomic become body build carry certainly Chapter close completely consider considerable course deal developed difficult direction discovered discuss distance Earth effect energy escape exist exploration extremely fact fall field Figure fuel give given gravity greater heat human hundred idea imagine important impossible increase interesting interplanetary involved journey known landing least less light limit live look lunar Mars material matter means miles minutes Moon motors moving necessary never observed once orbit oxygen perhaps period planets Plate possible practical present pressure probably problem produce purely radio reach reason relatively remain rocket round satellite seems seen ship shown simple Solar space spaceship speed stars stations structure surface telescope temperature thousand Universe velocity Venus weight whole