Word: struve
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Dates: during 1951-1951
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...clear, moonless night, far from any city glare, a keen-eyed observer can see in the sky a faintly glowing cone. This is the "zodiacal light," which astronomers believe is sunlight reflected from dust particles revolving around the sun like microscopic planets. In Sky and Telescope, Astronomer Otto Struve of the University of California tells how he thinks the dust got there...
...disappeared. The smaller particles of it were blown out of the solar system by the pressure of sunlight. The larger ones were swept up by the planets or captured by the sun itself. The existing particles are comparatively "young" (as ages are measured in astronomy); they were formed, thinks Struve, by the "gravel-mill" action of the bodies in the solar system clashing against one another...
...level parts of the moon, for instance, are covered by a three-inch layer of dust tossed out of meteorite craters. Last year a cloud of yellow dust was seen for a few hours on Mars by Tsuneo Saheki. Struve thinks it was probably stirred up by a meteorite striking through the thin Martian atmosphere and shattering Martian rock...