Word: diameterically
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The controversial proposal, which is being evaluated by five U.S. companies under NASA study contracts totaling $490,000, would launch inflatable satellites into synchronous orbits 22,300 miles above the earth. Opened up and inflated, the satellites would take the shape of disks 2,000 ft. in diameter, each with...
These clues strengthen Kuiper's belief that Copernicus was formed by the impact of a comet, one of three or four that have hit the visible side of the moon during its 4½-billion-year lifetime. He estimates that the comet weighed a million million tons, had a...
What the U.S. Public Health Service recommends, and the A.D.A. approves, is a machine that delivers an X-ray beam 2¾ in. in diameter. Extra-heavy aluminum filters weed out useless rays, and lead shielding keeps all radiation within bounds. The patient gets only a small fraction of the...
In the operating room, nurses pasted electrodes to the President's chest, so that a continuous electrocardiogram could be taken and shown on a TV-type screen. Dr. Didier worked a thin plastic tube through the President's throat and down his windpipe to deliver the anesthetic. Anesthetics...
The phenomenon arises when the last rays of sunlight before totality gleam through the valleys and depressions of the mountainous lunar surface, creating, in effect, a "perforated" ring of sunlight about the edge of the moon. By accurately timing the event, the experimenters plan to collate more precise measurements of...