Jacoby, Harold, 1865-1932 · New York, The Macmillan company · leaf 503
APPENDIX where S is the sun's mass, a the linear diameter of the binary- orbit in terms of the distance earth-to-sun as a unit, and t the binary orbital period in years. Note 44. Size of Andromeda Nebula (p. 353). Figure 124 will make this clear. S is the sun ; E, the earth ; and N, the center of… … Fig. 124. Size of Andromeda Nebuia. posed observer at the nebula. The angle CSC is the angular diameter of the nebula, seen from the solar system, and it is 1.5°. Therefore the linear distance CC must be greater than ES in the approximate ratio 1.5C , or 540,000. 0".01 Note 45. Attraction of…
Astronomy
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