Stellar Movements And the Structure of the Universe
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To quickly assess the difficulty of the text, read a short excerpt:
Latitude.
I.
o + 62-:^ 8 189 79 61 176 56 II.
-f-41'8 28 184 58 69 174 49 III.
+ 21-0 69 263 83 70 212 57 IV.
-f 9-2 206 323 96 99 266 77 V.
- 7'0 161 382 116 84 239 45 VI.
-22-2 158 276 117 100 247 69 VII.
-38-2 57 161 94 59 203 59 VIII.
-62-3 29 107 77 67 202 45 1 66 STELLAR MOVEMENTS CHAP.
The eight zones are of equal area, so that the numbers show directly the relative density at different galactic latitudes.
Pickering's division of the spectral types was as follows : B = O-B8; A = B9- L \3...; F = A4-F2; G = F5 - G ; K = G5 K2; M = K5 N. The divisions are somewhat different from those we have previously considered.
Taking the degree of concentration shown in these o o tables as a measure of average distance, we should arrange the types in the order of decreasing distance and decreasing luminosity, thus : B, A, F^FG, K, M, which is identical with the order of evolution usually accepted.
This agrees well with the results of Chapter III. As to the luminosity of the stars derived from parallax investiga- tions.
What to read after Stellar Movements And the Structure of the Universe?
You can find similar books in the "Read Also" column, or choose other free books by Arthur Stanley Eddington to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Latitude.
I.
o + 62-:^ 8 189 79 61 176 56 II.
-f-41'8 28 184 58 69 174 49 III.
+ 21-0 69 263 83 70 212 57 IV.
-f 9-2 206 323 96 99 266 77 V.
- 7'0 161 382 116 84 239 45 VI.
-22-2 158 276 117 100 247 69 VII.
-38-2 57 161 94 59 203 59 VIII.
-62-3 29 107 77 67 202 45 1 66 STELLAR MOVEMENTS CHAP.
The eight zones are of equal area, so that the numbers show directly the relative density at different galactic latitudes.
Pickering's division of the spectral types was as follows : B = O-B8; A = B9- L \3...; F = A4-F2; G = F5 - G ; K = G5 K2; M = K5 N. The divisions are somewhat different from those we have previously considered.
Taking the degree of concentration shown in these o o tables as a measure of average distance, we should arrange the types in the order of decreasing distance and decreasing luminosity, thus : B, A, F^FG, K, M, which is identical with the order of evolution usually accepted.
This agrees well with the results of Chapter III. As to the luminosity of the stars derived from parallax investiga- tions.
What to read after Stellar Movements And the Structure of the Universe?
You can find similar books in the "Read Also" column, or choose other free books by Arthur Stanley Eddington to read onlineMoreLess
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