Word: lighters
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...same time, hot gases, being lighter, rise from the interior to the surface, while cooler, heavier gases descend -- a process called convection (similar to what occurs in a hot oven). As a result of these massive convection currents and the differing rates of solar rotation, the magnetic lines of force begin wrapping around the sun like ropes. The wrapping action stretches the ropes and creates magnetic fields so strong that they repel the surrounding solar gases. In effect, this makes the magnetic regions lighter than the gases, and they begin to rise. Some reach the surface and become sunspots, dark...
...darker central portions of sunspots, or umbras, have the strongest magnetic fields; the lighter exteriors, or penumbras, the weaker fields. Occasionally, the penumbras of two sunspots of opposite polarity merge as they move past each other, putting the oppositely charged umbras in contact. The results are spectacular. "Because the umbras have opposite polarities, they attract each other," says the Marshall Center's Moore. "The closer they are together, the stronger the pull. Then, as they push past each other, it's like an earthquake fault slipping. In this case the stored energy is released in a flare." In the sunspot...
...phased- $ array radar technology, which will use thousands of tiny, independent sensors to sweep large sections of the sky. The new radar will provide sharper resolution and greater range than traditional back-and-forth scanners. In addition, the Japanese will pay for the development of a larger, stronger and lighter wing...
When the State Concert Agency relaxed its regulations in 1986, rock bands suddenly could play their music in big halls, with thousands of screaming fans in attendance. The effect was electrifying, and the kids knew whom to thank for the lighter touch. One of the new bands, a Moscow-based group called Grand Prix, introduced a song last year called simply Gorbachev. The haunting chorus ("I understand! Gorbachev!") is less a tribute to the man in power than a defiant youth anthem, undoubtedly the first to use a Soviet leader as an emblem of teenage aspirations...
...before," that is close to a physical impossibility. Earlier mishaps suggest that only about 10% of the oil from such a massive spill (this one totaled at least 10.1 million gal., perhaps 12.6 million) will ever be recovered. Some of the rest evaporates. But as the lighter components escape into the air, most of the oil turns into a thick black gunk that eventually sinks to the bottom. There it is joined by oil that first coated beaches but little by little washes back into the water...