The Exploration of SpacePresents a nonscientific explanation of space exploration and a view of future life on other planets. |
Din interiorul cărții
Rezultatele 1 - 3 din 22
Pagina 23
In A.D. 160 it seemed natural enough to imagine that , if one could make a workable pair of wings , they could be used to take one to the Moon . After Lucian , the theme of space - travel was neglected for almost fifteen hundred years .
In A.D. 160 it seemed natural enough to imagine that , if one could make a workable pair of wings , they could be used to take one to the Moon . After Lucian , the theme of space - travel was neglected for almost fifteen hundred years .
Pagina 72
... gun barrel is compared with the trajectory of the shell , so when we are considering interplanetary journeys we can forget about the initial period of acceleration and imagine that the spaceship starts with the required velocity .
... gun barrel is compared with the trajectory of the shell , so when we are considering interplanetary journeys we can forget about the initial period of acceleration and imagine that the spaceship starts with the required velocity .
Pagina 169
No doubt spaceships orbiting a few thousand miles out may one day probe those immense atmospheres with radar beams and other tools of future science , but any closer contact than this is difficult to imagine .
No doubt spaceships orbiting a few thousand miles out may one day probe those immense atmospheres with radar beams and other tools of future science , but any closer contact than this is difficult to imagine .
Ce spun oamenii - Scrie o recenzie
Nu am găsit nicio recenzie în locurile obișnuite.
Cuprins
Preface to the 1951 Edition | 11 |
Thirty Years Later | 15 |
The Shaping of the Dream | 21 |
Drept de autor | |
18 alte secțiuni nu sunt arătate
Alte ediții - Afișează-le pe toate
Termeni și expresii frecvente
able acceleration achieved actual already appear astronautics atmosphere become body build carry certainly Chapter close completely consider considerable course deal developed difficult direction discuss distance Earth effect energy equal escape exist exploration extremely fact fall field Figure fuel give gravity greater heat human hundred idea imagine important impossible increase interesting interplanetary involved journey known landing later least less light limit live look lunar Mars material matter means miles million minutes Moon moving necessary never normal observed once orbit oxygen perhaps period planets possible practical present pressure probably problem produce purely radio range reach reason remain rocket round satellite scientific seems seen ship simple Solar space spaceship speed stars surface telescope temperature thousand tion velocity Venus weight
Referințe la această carte
The MIR Space Station: A Precursor to Space Colonization David M. Harland Vizualizare fragmente - 1997 |
Space Travel: A History Wernher Von Braun,Frederick Ira Ordway (III),Fred Durant,David Dooling Vizualizare fragmente - 1985 |