Popular Astronomy: A Series of Lectures Delivered at IpswichMacmillan, 1868 - 292 σελίδες |
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Σελίδα 7
... centre . It goes very near the horizon when lowest in the north , and almost over our heads when highest in the south . If you examine the movement of the last of the stars I have mentioned , namely , the bright star in the ...
... centre . It goes very near the horizon when lowest in the north , and almost over our heads when highest in the south . If you examine the movement of the last of the stars I have mentioned , namely , the bright star in the ...
Σελίδα 8
... centre , and that the movements of the stars are of such a nature that they will appear to turn round that one centre ; the first idea that naturally occurs is , that the starry heavens , as we see them ( I do not affix any precise ...
... centre , and that the movements of the stars are of such a nature that they will appear to turn round that one centre ; the first idea that naturally occurs is , that the starry heavens , as we see them ( I do not affix any precise ...
Σελίδα 10
... centre . But there is another important thing to discover- with what rapidity do the stars turn ? Do some travel quicker than others ? Do some go quickly in one part , and slowly in another ? Now , we have most accurate means of ...
... centre . But there is another important thing to discover- with what rapidity do the stars turn ? Do some travel quicker than others ? Do some go quickly in one part , and slowly in another ? Now , we have most accurate means of ...
Σελίδα 13
... centre of the telescope in the position of the star we are looking at , and when we trace the course of that star down to the horizon , we find this as the universal fact that though the in- strument be set up as carefully as possible ...
... centre of the telescope in the position of the star we are looking at , and when we trace the course of that star down to the horizon , we find this as the universal fact that though the in- strument be set up as carefully as possible ...
Σελίδα 25
... centre of the circle which the Polar Star describes , and therefore that it should divide into two equal halves the circle which the Polar Star describes . ascertain it in this manner . We can measure the description of the parts of the ...
... centre of the circle which the Polar Star describes , and therefore that it should divide into two equal halves the circle which the Polar Star describes . ascertain it in this manner . We can measure the description of the parts of the ...
Άλλες εκδόσεις - Προβολή όλων
Popular Astronomy: A Series of Lectures Delivered at Ipswich George Biddell Airy Πλήρης προβολή - 1868 |
Popular Astronomy: A Series of Lectures Delivered at Ipswich George Biddell Airy Πλήρης προβολή - 1868 |
Συχνά εμφανιζόμενοι όροι και φράσεις
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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