The Sun: Ruler, Fire, Light, and Life of the Planetary System |
From inside the book
Results 1-5 of 81
Page xx
... shown to be gaseous · Janssen sees the prominence - lines when Sun is not eclipsed . Lockyer does the like , later but independently Study of the prominence - spectrum PAGE 213 214 216 217 . 217 219 219 223 227 228 229 233 234 235 236 ...
... shown to be gaseous · Janssen sees the prominence - lines when Sun is not eclipsed . Lockyer does the like , later but independently Study of the prominence - spectrum PAGE 213 214 216 217 . 217 219 219 223 227 228 229 233 234 235 236 ...
Page 15
... shown to be available in the case of the Moon is applied to the Sun , it is found to be absolutely ineffective . The nicest obser- vation fails to show any measurable difference in the Sun's position according as he is viewed from one ...
... shown to be available in the case of the Moon is applied to the Sun , it is found to be absolutely ineffective . The nicest obser- vation fails to show any measurable difference in the Sun's position according as he is viewed from one ...
Page 23
... shown by the powers of the telescope to be occupied by multitudes of minute stars , -and the minutest star serves quite as well as a large star for such observa- * Here I have supposed s , m , and m ' to lie all on the same arc , which ...
... shown by the powers of the telescope to be occupied by multitudes of minute stars , -and the minutest star serves quite as well as a large star for such observa- * Here I have supposed s , m , and m ' to lie all on the same arc , which ...
Page 24
... shown what is the true figure of each orbit . Thus Kepler's third law , by showing us the exact relation between the mean distances , shows us the exact relation between SM and SE ; and therefore between EM and S E. The plan here ...
... shown what is the true figure of each orbit . Thus Kepler's third law , by showing us the exact relation between the mean distances , shows us the exact relation between SM and SE ; and therefore between EM and S E. The plan here ...
Page 30
... shown to be thirty - five seconds as seen from the Earth , then the angle v v v would be greater ( because v is nearer to v ' than E is ) in the proportion of E v to v V , or roughly as 7 to 5 , so that the angle v v v ′ ( or E v E ...
... shown to be thirty - five seconds as seen from the Earth , then the angle v v v would be greater ( because v is nearer to v ' than E is ) in the proportion of E v to v V , or roughly as 7 to 5 , so that the angle v v v ′ ( or E v E ...
Contents
233 | |
240 | |
247 | |
253 | |
265 | |
282 | |
376 | |
383 | |
75 | |
81 | |
88 | |
93 | |
100 | |
107 | |
113 | |
150 | |
158 | |
162 | |
169 | |
176 | |
211 | |
213 | |
219 | |
227 | |
390 | |
402 | |
409 | |
415 | |
423 | |
428 | |
434 | |
441 | |
445 | |
448 | |
462 | |
481 | |
486 | |
490 | |
491 | |
500 | |
Other editions - View all
Common terms and phrases
angle Ångström aphelion appearance astronomers body bright lines centre chromatosphere clouds coloured consider corona corresponding dark lines deduced determine diameter direction Earth eclipse effect error estimate fact faculæ favourable globe greater Halley's method heat height Herschel hydrogen inferior conjunction ingress length less limb luminous Mars mass matter mean distance measure meteoric miles per second minute Moon Moon's motion noticed observations orbit pass path peculiarity penumbra perihelion phenomena photographs photosphere planets Plate polariscopic portion present prism problem prominences proportion rays recognised regarded regions remarkable researches respecting rotation round Secchi seems seen shown Sir William Herschel slit solar light solar parallax solar physics solar prominences solar spectrum solar spots space spectra spectroscope stars stations Sun can control Sun-spot Sun's disc Sun's distance Sun's surface supposed telescope terrestrial theory tion transit transits of Venus vapours velocity Venus violet visible zodiacal light
Popular passages
Page 451 - I have seen the wild stone-avalanches of the Alps, which smoke and thunder down the declivities with a vehemence almost sufficient to stun the observer. I have also seen snow-flakes descending so softly as not to hurt the fragile spangles of which they were composed ; yet to produce from aqueous vapour a quantity, which a child could carry, of that tender material, demands an exertion of energy competent to gather up the shattered blocks of the largest stone-avalanche I have ever seen, and pitch...
Page 184 - Hence he concludes that the sun has a very extensive atmosphere, which consists of elastic fluids that are more or less lucid and transparent ; and of which the lucid ones furnish us with light. This atmosphere, he...
Page 117 - I obtained a tolerably bright solar spectrum, and brought a flame coloured by sodium vapour in front of the slit. I then saw the dark lines D change into bright ones.
Page 439 - The sun's rays are the ultimate source of almost every motion which takes place on the surface of the earth. By its heat are produced all winds, and those disturbances in the electric equilibrium of the atmosphere which give rise to the phenomena of lightning, and probably also to those of terrestrial magnetism and the aurora.
Page 225 - Looked at in this point of view, we cannot refuse to regard them as organisms of some peculiar and amazing kind ; and though it would be too daring to speak of such organization as partaking of the nature of life, yet we do know that vital action is competent to develop both heat, light, and electricity.
Page 357 - The silvery rays were longest and most prominent at four points of the circumference — two upon the upper, and two upon the lower portion, apparently equidistant from each other . . . giving the spectacle a quadrilateral form. The angles of the quadrangle were about opposite the northeastern, north-western, south-eastern, and south-western points of the disc" (an arrangement corresponding precisely with the observations made at lower levels).
Page 194 - The spots, in this view of the subject, would come to be assimilated to those regions in the earth's surface, in which for the moment hurricanes and tornadoes prevail — the upper stratum being temporarily carried downwards, displacing by its impetus the two strata of luminous matter beneath, (which may be conceived as forming an habitually tranquil limit between the opposite upper and under currents,) the upper of course to a greater extent than the lower, and these wholly or partially denuding...
Page 188 - From experience we can affirm, that the performance of the most salutary offices to inferior planets, is not inconsistent with the dignity of superior purposes ; and, in consequence of such analogical reasonings, assisted by telescopic views, which plainly favour the same opinion, we need not hesitate to admit that the sun is richly stored with inhabitants.
Page 457 - Still, presented rightly to the mind, the discoveries and generalisations of modern science constitute a poem more sublime than has ever yet been addressed to the imagination. The natural philosopher of to-day may dwell amid conceptions which beggar those of Milton.
Page 458 - And still, notwithstanding this enormous drain in the lapse of human history, we are unable to detect a diminution of his store. Measured by our largest terrestrial standards, such a reservoir of power is infinite ; but it is our privilege to rise above these standards, and to regard the sun himself as a speck in infinite extension — a mere drop in the universal sea. We analyse the space in which he is immersed, and which is the vehicle of his power.