Word: dusted
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Dates: during 1960-1969
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ANTONI TAPIES-Martha Jackson, 32 East 69th St. Lumpy canvases filled with shapes hacked and gouged out of rubberized marble dust have a grim sobriety that evokes the sun-parched Catalan world the artist lives in. Through...
...Millstone Hill, Mass., which bounced electronic pulses off Venus. The mighty pulses from Arecibo will study Venus and the other planets more intimately. Turned on the moon, they will penetrate many feet below the surface. Their reflections received on earth will help predict what sort of rock or dust the first human explorers will find...
...Cosmic Dust. This reassuring news was delivered to the National Aeronautics and Space Administration with the authority of a firsthand report. For seven months, the satellite Explorer XVI orbited earth, inviting meteoroids to hit the instruments that encrusted most of its surface. There were cylinders of thin sheet metal containing helium gas that escaped when they were punctured by a meteoroid. There were instruments that gave an electrical signal when sunlight showed through a puncture hole in plastic film. There were also sensitive microphones that registered 15,000 occasions when something hit them hard enough to make them vibrate...
Only at rare intervals, though, did Explorer XVI collide with anything bigger than a microscopic bit of cosmic dust. There were 44 meteoroids that succeeded in penetrating a sheet of beryllium-copper one-thousandth of an inch thick, which is slightly thicker than household aluminum foil. The most powerful meteoroid encountered knocked a tiny hole in stainless steel three-thousandths of an inch thick. Metal as thick as the wall of a beer can went unpunctured. NASA's tentative conclusion is that the plentiful meteoroids are too small to do harm, and the dangerous ones...
Dirty Snowballs. Whipple is the author of the "dirty snowball" theory of comets. He believes comets form, molecule by molecule, out of frozen gases beyond the outermost planets. They pick up bits of dust and start drifting ever so slowly toward the distant sun. When they gather speed as they approach the sun, their surface gets hotter, turning some of the frozen gas to vapor and freeing some of the dust to form the comets' glowing heads and tails. When an old comet disintegrates, it leaves bits of fluff to wander in space...