Word: spaceships
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Space Limitations. In Manhattan, the New York Times called attention to a television program "telling of launching of first spaceship carrying passengers to the moon," said it was the beginning of "a dramatic series dealing with minor frustrations imposed by modern daily living...
...Mars, whose orbit is outside the earth's, the spaceship must climb up the side of the sun's gravitational pit-by speeding up. To reach Venus it must climb down-by slowing down...
...takes his departure from earth in the same direction that the earth is moving around its orbit (see chart). His ship must have a speed of only 870 m.p.h. over escape velocity. The excess speed is added to the earth's orbital speed (66,600 m.p.h.) that the spaceship had before it was launched. This is enough to offset the sun's gravitational pull, allows the ship to swing outward in an ellipse. If the timing is right, it makes a rendezvous with Mars on its orbit...
...speed than is needed to go to the moon, which is only 230,000 miles away. This is because space between the planets is comparatively smooth. It is only slightly affected by planetary gravitation, and the great pull of the sun is countered by the orbital speed that a spaceship inherits from its home planet...
...Space. But instruments can never bring back as much information as a spaceship with a human crew. The difficulties of manned space flight are still enormous, and they seem to increase the longer they are studied. The recently discovered belt of Van Allen radiation that rings the earth is a serious hazard that was not dreamed of a few months...