The Exploration of SpacePocket Books, 1979 - 237 pagini Presents a nonscientific explanation of space exploration and a view of future life on other planets. |
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Pagina 37
... limit to the height at which conventional aircraft can ever operate . That limit is between ten and fifteen miles - or , roughly speaking , where the air pressure is more than one - twentieth of its sea - level value . Balloons can ...
... limit to the height at which conventional aircraft can ever operate . That limit is between ten and fifteen miles - or , roughly speaking , where the air pressure is more than one - twentieth of its sea - level value . Balloons can ...
Pagina 66
... limit : once that limit has been agreed , a country would appear to have no redress if an inquisitive neighbor started making rocket recon- naissances as long as they were at a legal height ! We will return , in Chapter 15 , to some of ...
... limit : once that limit has been agreed , a country would appear to have no redress if an inquisitive neighbor started making rocket recon- naissances as long as they were at a legal height ! We will return , in Chapter 15 , to some of ...
Pagina 215
... limit is a fundamental one , of a completely different character from the so- called " sonic barrier " which once ... limits set by the laws of Nature ( and we must assume that eventually these limits will be reached , even though we are ...
... limit is a fundamental one , of a completely different character from the so- called " sonic barrier " which once ... limits set by the laws of Nature ( and we must assume that eventually these limits will be reached , even though we are ...
Cuprins
Preface to the 1951 Edition | 11 |
Thirty Years Later | 15 |
The Shaping of the Dream | 21 |
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acceleration airless already astronautics astronomers atmo atmosphere body bricks build carry certainly Chapter chemical completely conquest of space consider course crew degrees F difficult direction distance Earth energy enormous escape velocity exist exploration extremely fact Figure fuel Galaxy giant gravitational field gravity heat Hermann Oberth hundred miles idea imagine important interplanetary flight interplanetary travel interstellar ionosphere Jerry Pournelle journey Jupiter landing large number light light-years lunar Mars and Venus Martian means Mercury meteors miles in diameter million minutes missile Moon Moon's motors never normal observed once oxygen payload perhaps planetary planets Pluto possible pounds pressure probably problem produce propellant propulsion Proxima Centauri radar radio reach reason refueling rocket power satellite Saturn scientific ship Solar System space space-flight space-station space-suits space-travel spaceship speed spin stars stations surface take-off telescope temperature thousand thrust tion trolley voyage weight weightless