Popular Astronomy: A Series of Lectures Delivered at IpswichMacmillan, 1868 - 292 sider |
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Side 7
... direction , pointing nearly , but not exactly , to the Polar Star , we find that the stars which are close in the direction of this rod , as seen by viewing along it , describe a very small circle ; the stars further from it describe a ...
... direction , pointing nearly , but not exactly , to the Polar Star , we find that the stars which are close in the direction of this rod , as seen by viewing along it , describe a very small circle ; the stars further from it describe a ...
Side 8
... this town would set up an Equatoreal instrument . The Equatoreal is an instrument , which , in one form , is represented in Figure 1. It turns round an axis AB , and the axis is placed in that direction 8 POPULAR ASTRONOMY .
... this town would set up an Equatoreal instrument . The Equatoreal is an instrument , which , in one form , is represented in Figure 1. It turns round an axis AB , and the axis is placed in that direction 8 POPULAR ASTRONOMY .
Side 9
A Series of Lectures Delivered at Ipswich George Biddell Airy. AB , and the axis is placed in that direction which FIG . 1 . leads to the point of the sky around which the stars The appear to turn , and which is not far. LECTURE I. 9.
A Series of Lectures Delivered at Ipswich George Biddell Airy. AB , and the axis is placed in that direction which FIG . 1 . leads to the point of the sky around which the stars The appear to turn , and which is not far. LECTURE I. 9.
Side 10
... direction , the instrument turns round that axis , and it carries the telescope CD , which , of course , so long as you give it no other motion , retains the same inclination to that axis ; but to which you may give another motion , so ...
... direction , the instrument turns round that axis , and it carries the telescope CD , which , of course , so long as you give it no other motion , retains the same inclination to that axis ; but to which you may give another motion , so ...
Side 14
... direction of the light has been diverted by the action of the water in the trough . That effect is produced by the ... direction of the line AB , does not pursue its original direction , but when it is received by the prism of water , it ...
... direction of the light has been diverted by the action of the water in the trough . That effect is produced by the ... direction of the line AB , does not pursue its original direction , but when it is received by the prism of water , it ...
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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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