The Sidereal Messenger: A Monthly Review of Astronomy, Volume 7Carleton College Observatory, 1888 |
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angle aperture appearance April asteroids astronomical atmosphere axis body bright Carleton College Carleton College Observatory catalogue Central centre clock comet computed corona Cygni Decl declination diameter disc distance double stars E. E. Barnard earth eclipse ephemeris equator equatorial ether force give glass gravity Harvard Harvard College Observatory heat Heliometer inches instrument interest June Jupiter Lick Observatory light magnitude Mars mass means Mercury Meridian Circle MESSENGER method micrometer Minor Planet month moon moon's motion nebula number of stars object observations orbit parallax particle photographic photosphere plates position Prof Professor radius refractor right ascension ring rotation satellites Saturn seen Sept sextant solar spectroscope spots stellar sun's surface telescope theory tion totality transit vapors velocity Venus visible W. H. S. MONCK Warner Observatory
Popular passages
Page 366 - Other Worlds than Ours ; The Plurality of Worlds Studied under the Light of Recent Scientific Researches.
Page 366 - NEW STAR ATLAS for the Library, the School, and the Observatory, in 12 Circular Maps (with 2 Index Plates).
Page 383 - Whilst all the stars that round her burn, And all the planets in their turn, Confirm the tidings as they roll, And spread the truth from pole to pole. What though, in solemn silence, all Move round the dark terrestrial ball; What though no real voice nor sound Amid their radiant orbs be found ; In reason's ear they all rejoice, And utter forth a glorious voice ; Forever singing as they shine, The hand that made us is divine.
Page 366 - Star Primer. Showing the Starry Sky Week by Week, in 24 Hourly Maps. Crown 410.
Page 57 - ... up between flagstones, the rainbow sheen of oil on a puddle, red ranks of chimney pots. The place is brilliant, and elusive; a quicksilver scene in which no sight nor sound is the same twice. It vanishes as soon as it appears, leaving only the indelible signals of the mind. He stood with Eva Burden at the foot of the flight of steps leading up to the main entrance of Frobisher House. The glass engraving was in place, installed a few days earlier. The purpose of today's visit, at the behest of...
Page 366 - THE ORBS AROUND Us ; a Series of Essays on the Moon and Planets, Meteors and Comets. With Chart and Diagrams, crown 8vo.
Page 388 - ... the absolute zero of these, as compared with heat, long period vibrations. We seem to be approaching a theory as to the structure of the ether. There are difficulties from diffusion in the simple theory that it is a fluid full of motion, a sort of vortex sponge. There were similar difficulties in the wave theory of light owing to wave propagation round corners, and there is as great a difficulty in the jelly theory of the ether arising from the freedom of motion of matter through it. It may be...
Page 389 - The opposite sides of a vortex ring might perchance suit ; or may be the ether, after all, is but an atmosphere of some infra-hydrogen element : these two latter hypotheses may both come to the same thing. Anyway we are learning daily what sort of properties the ether must. have. It must be the means of propagation of light ; it must be the means by which electric and magnetic forces exist ; it should explain chemical actions and, if possible, gravity.
Page 388 - ... the jelly theory of the ether arising from the freedom of motion of matter through it. It may be found that there is diffusion or it may be found that there are polarized distributions of fluid kinetic energy which are not unstable when the surfaces are fixed ; more than one such is known. Osborne Reynolds has pointed out another, though in my opinion less hopeful, direction in which to look for a theory of the ether. Hard particles are abominations. Perhaps the impenetrability of a vortex would...
Page 78 - ... furnished the standard for all other work, is without any standard for the construction of its own instruments. How many of the parts of an astronomical or physical instrument should be made interchangeable, I am not now willing to say, but every worker with the telescope, spectroscope, or other instrument for physical research, will bear me out in this fact : that there is a sore need of standard dimensions in many of the parts of our apparatus. Indeed, our president, Professor Langley, was...