Popular Astronomy: A Series of Lectures Delivered at IpswichMacmillan, 1868 - 292 sider |
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Side 103
... pulling them towards the sun . The planets will sometimes go away from the sun , the sun will pull them back , and afterwards they will go away again , and be again pulled back , and so on . In order to explain this , I must proceed ...
... pulling them towards the sun . The planets will sometimes go away from the sun , the sun will pull them back , and afterwards they will go away again , and be again pulled back , and so on . In order to explain this , I must proceed ...
Side 108
... , carrying the two weights C and D at their ends ; and where they meet at E , let a third cord be attached , carrying the weight F ; then you will see that the tension or pull produced by this one weight 108 POPULAR ASTRONOMY .
... , carrying the two weights C and D at their ends ; and where they meet at E , let a third cord be attached , carrying the weight F ; then you will see that the tension or pull produced by this one weight 108 POPULAR ASTRONOMY .
Side 109
... pull in the direction EF does exert two pulls in different directions , AE and BE , for it really does keep the two cords strained to such a degree as to support the two other weights . We may say , on the other hand , that these two ...
... pull in the direction EF does exert two pulls in different directions , AE and BE , for it really does keep the two cords strained to such a degree as to support the two other weights . We may say , on the other hand , that these two ...
Side 110
... pulling at E ( Figure 36 ) in a downward direction , you may exert a force even greater than your downward pull at the two inclined directions ; and both these are accurate instances of what is called the resolution of forces . It must ...
... pulling at E ( Figure 36 ) in a downward direction , you may exert a force even greater than your downward pull at the two inclined directions ; and both these are accurate instances of what is called the resolution of forces . It must ...
Side 112
... pull- ing it with a very great force . The effect of the planet's path being so little curved there , is , that the planet passes the sun and begins to recede from it . But it does not recede perpetually . Suppose , for instance , that ...
... pull- ing it with a very great force . The effect of the planet's path being so little curved there , is , that the planet passes the sun and begins to recede from it . But it does not recede perpetually . Suppose , for instance , that ...
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Popular Astronomy: A Series of Lectures Delivered at Ipswich George Biddell Airy Uten tilgangsbegrensning - 1868 |
Popular Astronomy: A Series of Lectures Delivered at Ipswich George Biddell Airy Uten tilgangsbegrensning - 1868 |
Vanlige uttrykk og setninger
aberration of light accurate angle angular distance appear ascertain astronomers ball body bright star calculation Cambridge Cape Cavendish experiment celestial clock cloth College computed Crown 8vo curve described diameter direction disturbed earth earth's axis earth's centre earth's equator ecliptic Edition effect ellipse endeavoured equatoreal exactly explain Fcap Figure fluid globe Greenwich heavens horizon hour inclination Jupiter lecture length lunar precession Mars mean density method millions of miles moon mountain move Mural Circle nearly North Pole nutation object observations Observatory orbit parallax passes the meridian path pendulum perpendicular planets plumb-line point of Aries Polar Star position precession produced proportion pull refraction remark revolve rotation round the sun satellites seen sidereal day solar South Pole spheroid square sun's attraction sun's distance suppose supposition surface tance telescope thing tion transit instrument transit of Venus TREATISE triangle velocity vertical vibrations whole yard measure Zenith Sector
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