Rudimentary Astronomy

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Strahan & Company, 1869 - 172 páginas
 

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Contenido

Method of triangulating a district
9
Method of measuring azimuths
10
Principles of construction of the ztnith sector
11
Expeditions for the measure of an arc of the meridian
12
3233 Ratio of the earths polar and equatorial diameters
13
Statement of preliminary knowledge which is requisite for the student
14
Eeference to other works
15
Method of determining right ascensions
16
Means of measuring the error of collimation
17
Numerical correction for error of collimation
18
Numerical correction for error of level
19
Method of measuring the error of azimuth by means of two consecutive observations of the polar star
20
Method to be employed when two consecutive observations cannot be obtained
21
Method of obtaining by the transit instrument the error and rate of the clock
22
Northpolar distance the other coordinate necessary for de termining the place of a body
23
5051 Description of the mural circle
24
Method of eliminating the effect of excentricity of the circle
26
Principle of the conversion of differences of zenith distances
27
CHAPTER I
28
On the solar macules or spots on ihe position of the sun axis of rotation
32
CHAPTER III
34
Determination of apparent polar distances of the stars
40
Ellipse apparently described by a star round its mean place
50
Nutationellipe
56
On the solar faculas 169 Results of the observations of the solar eclipse of 1851
58
1
60
Value of the consta t of aberration
62
Sigm of the zodiac
66
Formulae for calculation of true anomaly
75
Force of gravity at the surface of the sun
84
ss
91
THE MOON 172 173 Importance of the knowledge of the motion of the moon
93
Regression of the node of t e lunar orbit
94
Excentricity of the orbit
95
Acceleration of the mean motion of the moon
96
Time of a tropical revolution of the moon
97

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