FREE BOOKS

Author's List




PREV.   NEXT  
|<   379   380   381   382   383   384   385   386   387   388   389   390   391   392   393   394   395   396   397   398   399   400   401   402   403  
404   405   406   407   408   409   410   411   412   413   414   415   416   417   418   419   420   421   422   423   424   >>  
influences. There is no end to the controversy whether the moon influences the weather; though one would think that question, being rather a terrestrial one, could easily be decided. Schwabe says Herschel is wrong in saying that the years of most solar spots were fruitful; but Wolf looks up the Zurich meteorological tables, and confirms Herschel. In _Ferguson's Astronomy_, the standard text-book of its day, we are informed that "Some of her mountains (the moon's) by comparing their height with her diameter, are found to be three times higher than the highest hills on earth." They would thus be over fifteen miles high. But Sir Wm. Herschel assures us that "The generality do not exceed half a mile in their general elevation." _Transactions of the Royal Society_, May 11, 1780. Beer and Madler have measured thirty-nine whose height they assure us exceed Mont Blanc. But M. Gussew, of the Imperial Observatory at Wilna, describes to us, "a mountain mass in the form of a meniscus lens, rising in the middle to a height of seventy-nine English miles."[338] As this makes the moon lopsided, with the heavy side toward the earth, the question of an atmosphere, and of the moon's inhabitability is reopened; and the discussion seems to favor the man in the moon; only he keeps on the other side always, so that we can not see him. The best astronomers have gravely calculated the most absurd problems--for instance the projection of meteorites from lunar volcanoes; Poisson calculated that they would require an initial velocity of projection of seven thousand nine hundred and ninety-five feet per second; others demanded eight thousand two hundred and eighty-two; Olbers demanded fourteen times as much; but La Place, the great inventor of the nebular theory, after thirty years' study fixed it definitely at seven thousand eight hundred and sixty-two! It appears that the absurdity of the discharging force of a part greater than the attracting force of the whole never occurred to him.[339] This same La Place supposed, that he could have placed the moon in a much better position for giving light than she now occupies; and that this was the only object of her existence. As this was not done he argued that her waxing and waning light was a proof that she was not located by an Omniscient Creator. He says he would have placed her in the beginning in opposition to the sun, in the plane of the ecliptic, and about four times her present distance fro
PREV.   NEXT  
|<   379   380   381   382   383   384   385   386   387   388   389   390   391   392   393   394   395   396   397   398   399   400   401   402   403  
404   405   406   407   408   409   410   411   412   413   414   415   416   417   418   419   420   421   422   423   424   >>  



Top keywords:

Herschel

 

height

 

hundred

 
thousand
 

thirty

 
question
 

exceed

 
influences
 

projection

 
calculated

demanded

 
eighty
 
fourteen
 
Olbers
 

astronomers

 
gravely
 

absurd

 

problems

 

instance

 
initial

velocity

 

ninety

 
require
 

Poisson

 

meteorites

 

volcanoes

 

absurdity

 

waning

 

waxing

 

located


Omniscient

 

argued

 

occupies

 
object
 

existence

 

Creator

 
present
 

distance

 
ecliptic
 

beginning


opposition

 
giving
 

position

 
appears
 

inventor

 

nebular

 
theory
 

discharging

 

supposed

 

occurred