Handbook of AstronomyLockwood & Company, 1875 - 528 |
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Strona 5
... represented in fig . 1. The wires are so adjusted that their point of intersection c coincides with the axis of the telescopic tube ; and when the instrument is so adjusted that the point of ob- servation , a star for example , is seen ...
... represented in fig . 1. The wires are so adjusted that their point of intersection c coincides with the axis of the telescopic tube ; and when the instrument is so adjusted that the point of ob- servation , a star for example , is seen ...
Strona 6
... represented in section in fig . 4 , where T is the telescope , p the pieces by which it is attached to the circle a в seen edgewise , the axis of which D works in a solid block of metal . The fixed index F is directed to the graduated ...
... represented in section in fig . 4 , where T is the telescope , p the pieces by which it is attached to the circle a в seen edgewise , the axis of which D works in a solid block of metal . The fixed index F is directed to the graduated ...
Strona 7
... represented in fig . 5 , so that the observer looks at the index through it . A system of cross wires is placed in the field of view of the microscope , and the whole may be so adjusted by the action of a fine screw , that the index ...
... represented in fig . 5 , so that the observer looks at the index through it . A system of cross wires is placed in the field of view of the microscope , and the whole may be so adjusted by the action of a fine screw , that the index ...
Strona 8
... represented in trans- verse section in fig . 6. This , which is called the PARALLEL WIRE с E D Fig . 6 . B MICROMETER , consists of two sliding frames , across which the parallel wires or threads C D are stretched . These frames are ...
... represented in trans- verse section in fig . 6. This , which is called the PARALLEL WIRE с E D Fig . 6 . B MICROMETER , consists of two sliding frames , across which the parallel wires or threads C D are stretched . These frames are ...
Strona 13
... to the south . Two The instrument thus mounted is represented in fig . 8 . stone piers are erected on a solid foundation standing east and west . In the top of each of them is ASTRONOMICAL INSTRUMENTS - THE TRANSIT . 13.
... to the south . Two The instrument thus mounted is represented in fig . 8 . stone piers are erected on a solid foundation standing east and west . In the top of each of them is ASTRONOMICAL INSTRUMENTS - THE TRANSIT . 13.
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Kluczowe wyrazy i wyrażenia
altitude aphelion apparent diameter apparent magnitude apparent motion appear ascertained Astronomer Royal astronomical atmosphere attraction axis azimuth bodies C. H. F. Peters celestial equator celestial sphere centre circle clock comet conjunction density determined direction disk diurnal diurnal motion earth ecliptic edge effect elongation Engineering equal equatorial equinoxial points excentricity feet firmament fixed globe greater greatest Greenwich heavens hemisphere Herschel horizon increase inferior conjunction inferior planet instrument interval Jupiter latitude length less light line of collimation longitude lunar mass mean distance measured meridian moon moon's move nearly nebula object Observatory observed orbit parallax pendulum perihelion period phenomena planet Plate polar pole position prime vertical produced ratio represented revolution revolve right angles right ascension ring rotation satellites Saturn seen sidereal solar system sphere spots stars sun's superior conjunction supposed surface synodic period telescope terrestrial tion transit Uranus velocity visible visual wires zenith
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