At one time it was thought that sunspots were due to some action of Jupiter--for Jupiter moves round the Sun in 11.
Prominences are largest and most frequent when {74} sunspots and faculæ are most frequent, and fewest when those are fewest.
But the rapid changes of sunspots and the violence of some of the prominence eruptions are but feeble indications of the most wonderful fact concerning the Sun, i.
For there is a well-marked progression in the zones of sunspots during the eleven-year cycle.
It is very hard to find analogies on our Earth for sunspots and for their peculiarities of behaviour.
But sunspots move about freely on the solar surface, and the different zones of that surface rotate in different times, the region of the equator rotating the most quickly.
There is unquestionably a correlation between sunspots and disturbances of the Earth's magnetic field .
Haven't there been a great many correlations announced between sunspots and various effects on the Earth?
But there is not a one-to-one correspondence between sunspotsand S-Regions.
I think our biggest advance was the discovery that sunspots themselves are not the direct cause of the disturbances we have been studying on the Earth.
The more sunspots the more violent and intense is the S-Region activity.
When it started off in July with a temperature of 103 degrees, the highest ever recorded in Philadelphia, they concluded that the sunspots were fooling them.
Longer periods of observation will permit comparisons that may yet define concurrent cycles of sunspots and weather.
A connection between sunspots and weather has not been established, therefore, although they are now known to affect the electrical condition of the earth's atmosphere.
Some interesting investigations with regard to sunspots have recently been published by Mrs. E.
This is the type of corona seen when the sunspots are least active.
To clinch the elimination of sunspots as a cause, their record tapes showed no burst of radiation when sunspot activity had been abnormal.
They investigated the possibility of unusual sunspot activity, but sunspots had been normal during the brief periods of high radiation.
Stars very far advanced in evolution, without showing variability, also exhibit similar spectra; so that there is much reason for regarding sunspots as emblems of advancing age.
Although sunspots have been observed with care in Europe only a little more than three centuries, the Chinese have records which go back nearly to the beginning of the Christian era.
The fact that the sunspotsshow similar cycles suggests that the sun's variations are the cause.
At that time sunspots are known to have been unusually numerous, and there were great climatic extremes.
Not all parts of the world, however, have increased storminess and more abundant rainfall when sunspots are numerous.
In ascertaining the relation between sunspots and earthquakes it would be well if we could employ the strict method of correlation coefficients.
In any event it is so slight that there is high probability that directly or indirectly sunspots and earthquakes are somehow connected.
The chief conclusions are, first, that when sunspots are numerous the average temperature of the earth's surface is lower than normal.
While this date is avowedly open to question, the great abundance of sunspots at that time makes it probable that it cannot be far wrong.
Third, the sunspots are only a partial and imperfect measure of the activity of the sun's atmosphere.
Sunspots of a given month and earthquakes of that month and the next: +0.
The result of the comparison of earthquakes and sunspots is shown in Table 7.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "sunspots" in a variety of sentences. We hope that you will now be able to make sentences using this word.
