Contributions from the Lick Observatory, Issue 4authority of the Regents of the University of California, 1895 |
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Common terms and phrases
40-foot telescope altitude aneroid appearance April 16 Arequipa Astronomer atmosphere axis Bronces camera cañon Carrizal Carrizal Bajo cause Chachani Chile Chronometer CLARK equatorial comet conspicuous coronal arches coronal matter coronal stream DALLMEYER direction distance diurnal motion eclipse station eruption exposures feet given inches inclined Index inner corona instruments Latitude lens Lick Observatory longitude Lower limb lower station March March 14 mass Merceditas meridian circle miles Mina Bronces Mollendo moon moon's limb moon's outline motion Mount Hamilton mountain negatives normal obtained outer corona particles photographic Pichu Pichu plates pole portion position position-angle Professor BAILEY projection prominences protuberances Region Remarks Sextant Observations Sextant Reading shadow bands shown side slide solar streamers streams of matter sun's center sun's equator sun's limb sun's outline sun's surface tions Total Eclipse tube Upper limb upper station Vallenar velocity visible WALKER Watch wings
Popular passages
Page 122 - DONATI'S comet); the axis of each column being roughly parallel to the direction of these coronal streams. Sudden and sharply abrupt changes in the direction of a comet's tail at great distances from the nucleus will be caused whenever the tail enters another coronal stream whose direction of motion is considerably inclined to the stream passing through the comet's nucleus. A natural consequence of such motions of coronal matter is to deprive all bodies, of very small mass of any non-growing atmosphere...
Page 124 - This result, it seems to me, is absolutely conclusive against the supposition that terrestrial magnetic storms are due to magnetic action of the sun, or to any kind of dynamical action taking place within the sun, or in connection with hurricanes in his atmosphere, or anywhere near the sun outside.
Page 124 - Thus, in this 8 hours of a not very severe magnetic storm, as much work must have been done by the Sun in sending magnetic waves out in all directions through space as he actually does in 4 months of his regular heat and light. This result...
Page 107 - ... double curvature. Each individual particle of the stream, however, describes a portion of a conic section, which is a very elongated ellipse so long as the initial velocity is less than 383 miles per second (assuming that the sun's atmosphere, as shown by various observations, is exceedingly rare). The variations in the type of the corona...
Page 121 - ... crossing one another). The atmosphere of a comet on striking these streams will in projection be in the form of luminous, nearly concentric, arcs, the greatest brilliancy being near the most advanced part of each stratum. More than one coronal stream will produce in the comet multiple tails, the angles between the tails being a function of the velocities of motion, and the inclinations of the streams. An examination of the cases where a tail is turned towards the sun is explained by a coronal...
Page 124 - ... comparable with the gigantic storms actually produced by hot fluid rushing up from below, and spreading out over the sun's surface. But now let us consider for a moment the work which must be done at the sun to produce a terrestrial magnetic storm. Take, for example, the magnetic storm of June 25, 1885, of which Adams gives particulars in his paper of June, 1891 (' Phil. Trans.,