Word: corona
(lookup in dictionary)
(lookup stats)
Dates: during 1960-1969
Sort By: most recent first
(reverse)
Electronic Bill Writer. A transistorized electric typewriter that takes instruction from a punched paper tape and automatically types in all the repetitive material on business order forms was put on sale by Smith-Corona Marchant Inc. The machine stops at the proper place on the form to let the operator type in such variables as quantity of items ordered. At the same time it prepares a punch tape record of the whole order, so that subsequent copies can be made automatically. Price...
Menzel plans to photograph the solar corona, an irregular luminous envelope visible only during a total eclipse. An unusual feature of his observations will be he use of polaroid cameras in place of raditional heavy equipment...
...thin gas pervades at least some parts of it. Scientists have argued for years about this tenuous stuff: one theory holds that interplanetary space is filled with "resident" gas that has nothing to do with the planets; another claims that the outer fringe of the sun's glowing corona sometimes reaches out as far as the earth's orbit. The issue remained in doubt for the simple reason that no one had actually sampled interplanetary space, but in Britain's New Scientist Professor Josif Shklovsky of Moscow's State Astronomical Institute tells how Soviet space probes...
After Professor Shklovsky and his team of astrophysicists analyzed the data, they concluded that the earth has a "geo-corona" of very thin ionized gas that extends out about 14,000 miles. Beyond 15,000 miles the Russians found no measurable ions, and Shklovsky believes that true interplanetary space has little or no resident gas. One possibility is that the streams of high-energy particles that shoot out of the sun (and probably cause the earth's Van Allen radiation belt) sweep the solar system clean of any gas that leaks into...
...earth's corona, Astrophysicist Shklovsky reasons, is mostly hydrogen which came originally from the earth's oceans. Water vapor works its way up from the lower atmosphere. When it reaches about 60 miles, its molecules are broken into oxygen and hydrogen by solar radiation. The hydrogen, being lighter, tends to rise, and above about 1,000 miles it becomes the main constituent of the atmosphere. Some of its molecules get hot enough and move fast enough to reach escape velocity and leave the earth entirely. Moscow's Professor Shklovsky believes that enough hydrogen has escaped in this...