The Challenge of Space Exploration: A Technical Introduction to Space |
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30 kilometers acceleration altitude artificial satellite atmos atmosphere lies atoms braking rockets burnout celestial mechanics circular orbit combustion chamber cosmic ray degrees Centigrade direction Earth Earth's atmosphere Earth's gravity Earth's orbit Earth's surface electrons ellipse energy equatorial bulge escape velocity exhaust velocity force free fall fuel and oxidant galaxy gases gravitational pull guidance hyperbola injection interplanetary space ionosphere ions laws of motion liquid propellant rocket Lunar man's Mars mass ratio mean distance miles per hour miles per second millions missions natural moon natural satellite nozzle NUCLEAR ROCKET oxygen particles path payload perigee period of revolution phere Planetary possible primary radiation belt radio REACTOR resistance rocket engine rocket jet rocket propellant rocket vehicle rotation satel sea level solar system solid SPACE EXPLORATION space flight space probes space research space vehicle spaceman specific impulses speed required star sufficiently great speed temperature velocity of escape Venus VOLTS weight weightlessness