Word: maxima
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Dates: during 1920-1929
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...study of the graphs further shows that a rather definite fifteen month period in solar activity exists as exhibited by both spots and radio reception. This is one of the outstanding results of the investigation to date. Each of these sunspot sub-maxima have indicated increasing solar activity and it does not yet appear possible to state that we have reached the real maximum of the sunspot cycle until the sun peak of 1929 is reached and passed. The intensity of that peak will doubtless decide whether or not the maximum of the present sunspot cycle is reached...
...view of the fifteen months period of maxima and minima which appears to be definitely located both in the sunspot and radio curve, we may look for another maximum of solar activity in September or October...
...wild theories of their relation to terrestrial conditions have been advanced. They do seem to be of a magnetic nature and to produce electrical and atmospheric disturbances on the earth at certain periods. Professor Tchijewsky, a Russian scientist, has recently come out with a theory that at sun spot maxima, worldly affairs are excited and wars, revolutions, migrations, etc.. break out. He thinks he has traced definite cycles of such historical events in the 19th Century paralleling the sun spots. The purely fantastic character of this conjecture is obvious; the problem of the physical influence of the spots...
...stars of the same color type would be greatest in the same parts of their spectra, but surprising differences were found. Vega and Sirius are both blue-white stars, but the maximum heat of Vega is much farther toward the violet than that of Sirius. Rigel (blue) shows two maxima, one of which is in the infrared rays, invisible to the human eye. The apparatus detects differences of a hundred-millionth of a degree of heat. That is not enough, say the astronomers. It must be sharpened to a thousand-millionth, and many fainter stars of every type must...