The Exploration of Space |
Din interiorul cărții
Rezultatele 1 - 3 din 25
Pagina 39
When one allows for this , the initial weight of a chemically fuelled spaceship on taking off from the Earth would be not hundreds but hundreds of thousands of tons — and the whole project becomes , if not impossible , certainly ...
When one allows for this , the initial weight of a chemically fuelled spaceship on taking off from the Earth would be not hundreds but hundreds of thousands of tons — and the whole project becomes , if not impossible , certainly ...
Pagina 156
Complete coverage of the whole Earth would be provided by three stations , revolving in the same orbit but spaced 120 degrees apart . ( Figure 18. ) The obvious orbit for this purpose would be the 24 - hour one , 22,000 miles above the ...
Complete coverage of the whole Earth would be provided by three stations , revolving in the same orbit but spaced 120 degrees apart . ( Figure 18. ) The obvious orbit for this purpose would be the 24 - hour one , 22,000 miles above the ...
Pagina 195
To us a thousand years later , the whole story of Mankind before the twentieth century seems like the prelude to some great drama , played on the narrow strip of stage before the curtain has risen and revealed the scenery .
To us a thousand years later , the whole story of Mankind before the twentieth century seems like the prelude to some great drama , played on the narrow strip of stage before the curtain has risen and revealed the scenery .
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