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Space near the earth is not as beset with micrometeorites as some space pessimists have feared. During last week's Washington meeting of the American Physical Society, Drs. Edward Manring and Maurice Dubin of the Air Force Cambridge Research Center told about the experiences of the Army's satellite Explorer I, which carries two meteorite detectors. One of them, a microphone that picks up the slight vibrations in the satellite's shell that are caused by the smallest dust particles, registered only seven hits during the 120 minutes that the transmitter could be heard. The other detector...
Escape Velocity. When the Aerobee's nose exploded 55 miles up, the focused force of the shaped charges made three jets of aluminum pellets shoot into the near-vacuum like shot from three shotguns. The Air Force announcement is none too clear about what happened, but Maurice Dubin, physicist in charge of the project, thinks that some of the pellets reached the speed of 40,000 m.p.h. A photograph taken of the explosion showed meteorlike trails whose speed could be measured by a fast-moving shutter on the camera...
Since the particles started their flights at an altitude where there is still a little air, they were probably slowed down considerably by it. But Dubin thinks that some of them may have reached outer space while still moving about 30,000 m.p.h. This exceeds the escape velocity (25,000 m.p.h.) that is necessary to carry an object beyond the pull of the earth's gravitation. Any particles that did escape moved into the sun's gravitational jurisdiction. They will either 1) be swallowed by the sun, or 2) move around it on elliptical, cometlike orbits...
Gerald Richmond of Dorchester, Mass. and Dudley, George Hubert Stout, St. Louis and Adams, Chemistry; Richard Parks Turner, Dayton, Ohio and Lowell, Linguistics and Romance Languages; Robert Arthur Wallace, of Springfield, Mo. and Lowell, English, and Eric Wolman, of New York and Lowell, Math.; Theodore Donald Dubin, of Brooklyn, N.Y. and Lowell, Biochemical Sciences...
Keep Off the Grass (music & lyrics by James McHugh & Al Dubin; produced by the Shuberts) is the first summer musical to hit Broadway. It might as well be any hot-weather revue of the past 20 years, with too few good tunes and too many bad sketches; but it has Jimmy Durante's desperate clowning. Ray Bolger's skipping feet, some pretty girls, some entertaining specialty numbers...