Word: venusized
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...radio are colder: 27° F. Eighty-seven slight impacts from , micrometeorites and five heavier ones were registered, but nothing really damaging. Other data will take months to interpret. Eventually they will tell about cosmic rays, magnetic fields and other space conditions between the earth and the orbit of Venus...
Slower Is Closer. To shoot at Venus or its orbit, a probe must be shot in the opposite direction to the motion of the earth on its orbit around the sun. Most of its speed will be expended in pulling away from the earth's gravitation. Any speed left over will be subtracted from the orbital speed (66,600 m.p.h.) that the probe had-as every mountain, building and man has-as part of the earth. Left behind in space with reduced speed, the probe will curve inward toward...
...itself in an eccentric solar orbit. The more backward speed the probe has when it clears the earth, the slower it will be moving around the sun and the farther it will fall toward the sun before it goes into a solar orbit. To fall all the way to Venus, whose orbit is 25 million miles inside the earth's, a probe would have to escape from the earth with a backward velocity of 5,670 m.p.h...
Pioneer V did not attain quite this speed, missing it by about 150 m.p.h. So instead of intersecting the orbit of Venus, it will stay about 7,500,000 miles outside. During each of its trips around the sun, which will take 311 days, Pioneer V will swing outward toward the earth's orbit. But only very rarely will the earth be there to meet it. NASA scientists estimate that at least 100,000 years may have to pass before Pioneer V gets close enough to the earth to burn up in its atmosphere...
...impossible to predict to what extent the orbit of Pioneer V will be disturbed by the gravitational pull of the earth and Venus...