Word: infra
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...arms embargo. Each Sa'ar (Hebrew for storm) carries eight Gabriels. According to Pentagon specialists, the missile represents a technological breakthrough and greatly outperforms the Soviet Styx system, which the Egyptian navy used to sink the Israeli destroyer Elath in 1967. Its guidance is self-contained, combining both infra-red (heat-seeking) and radar-homing techniques. The Gabriel hunts down its target at such low levels that it becomes coated with sea spray on long flights. Washington is particularly interested in the fact that the new missile seems to be eminently capable of delivering a nuclear warhead...
...also one of the most dangerous for observers. As more and more of the solar disk is blotted out, the sky darkens, and it becomes easier to gaze directly at the sun. While the visible light lessens, however, the pupils of the viewer's eyes dilate, allowing infra-red radiation from the still uncovered crescent of the sun to focus on his retinas. Although he feels no pain, the infra-red can quickly burn his retinas, causing irreparable damage to his vision. To avoid eye injury, medical authorities suggest that observers who look directly at an eclipse should...
...orbit. This will eliminate a potential hazard to future lunar navigation as well as cause enough of a thud to give earthbound seismologists a good calibration test of the new lunar seismometer. Next, the astronauts will shoot a series of closeup photographs of the moon, using both ordinary and infra-red film to help NASA planners pick out landing sites for the remaining eight Apollo missions. Finally, Yankee Clipper's engine will be fired once again to begin the long, leisurely journey back to earth. Ten days 4 hr. 30 min. after it sets off from Cape Kennedy, Apollo...
...based Pacific Lighting Service Co. has applied the same principle to auto engines. After yearlong tests of six cars and trucks fueled by natural gas, the company reports a dramatic decrease in air pollution. Because natural gas burns cleanly, the vehicles emitted almost no hydrocarbons. Measuring the emissions with infra-red light, engineers found that carbon monoxide in the exhaust fell from 28 grams per mile with gasoline to 2 with natural gas; nitrous oxides dropped from 4 grams to .5. Already the company has started converting 1,100 other vehicles in its fleet to natural gas. Last month...
Other scientists at Pasadena's Jet Propulsion Laboratory (JPL) hotly dispute the idea that the polar caps are largely frozen water. Most investigators are now convinced that they are mostly frozen carbon dioxide, otherwise known as dry ice. Mariner 7 helped their argument. Its infra-red radiometer measured the temperature of the area at - 253°F., or roughly the frost point of carbon dioxide on Mars...