The Exploration of SpaceTemple Press, 1951 - 198 pagini |
Din interiorul cărții
Rezultatele 1 - 3 din 48
Pagina 12
... interplanetary navigation . Finally , the shapes of the orbits . They are very nearly circular , with the Sun at the centre . Only Mercury , Mars and once again - Pluto depart seriously from this rule , their orbits being appreciably ...
... interplanetary navigation . Finally , the shapes of the orbits . They are very nearly circular , with the Sun at the centre . Only Mercury , Mars and once again - Pluto depart seriously from this rule , their orbits being appreciably ...
Pagina 46
... interplanetary travel it would , almost inevitably , be fatal . We can now sum - up the requirements for any interplanetary voyage , as follows : ( 1 ) The ship must build up sufficient speed to escape from the Earth , and when it has ...
... interplanetary travel it would , almost inevitably , be fatal . We can now sum - up the requirements for any interplanetary voyage , as follows : ( 1 ) The ship must build up sufficient speed to escape from the Earth , and when it has ...
Pagina 86
... interplanetary purposes . Our " window " into space will pass an enormous band of radio - frequencies , covering all the television and radar services , and in fact stretching , with only a few gaps , right down through the centimetre ...
... interplanetary purposes . Our " window " into space will pass an enormous band of radio - frequencies , covering all the television and radar services , and in fact stretching , with only a few gaps , right down through the centimetre ...
Cuprins
THE SHAPING OF THE DREAM | 1 |
THE EARTH AND ITS NEIGHBOURS | 9 |
THE ROCKET | 17 |
Drept de autor | |
19 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 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 scientific seems seen ship shown simple Solar space spaceship speed stars stations structure surface telescope temperature thousand Universe velocity Venus weight whole