E e barnard and numerous others (1 risultati)

Hardcover. Condizione: Very Good. POINCARE, Henri. "The Milky Way and the Theory of Gases" and with BARNARD, E.E. "On the Vacant Regions of the Sky" in Popular Astronomy, Goodsell Observatory, Northfieldf, MN. 1917, volume 25. Xvi, 642, 14 plates. [\] Sturdily bound in library cloth, with reinforced joints, making this an easy-to-use antique book. There are library stamps on the title page, exterior top and bottom text block edges, and on each title page for each month of the year. That said, this is not a bad-looking volume, the description probably makes this worse-sounding than it is, though it is better to be pleasantly surprised than not. [\] POINCARE, Henri. "The Milky Way and the Theory of Gases", pp 475-488 and with BARNARD, E.E. "On the Vacant Regions of the Sky" (an early epoch of modern thinking on "Dark Matter"), pp 581-583, with three beautiful photo plates. The Poincare and Barnard papers are both early modern work on what would become "dark matter": "The hypothesis of dark matter has an elaborate history.  In a talk given in 1884,  Lord Kelvin estimated the number of dark bodies in the Milky Way from the observed velocity dispersion of the stars orbiting around the center of the galaxy. By using these measurements, he estimated the mass of the galaxy, which he determined is different from the mass of visible stars. Lord Kelvin thus concluded "many of our stars, perhaps a great majority of them, may be dark bodies".  In 1906 Henri Poincaré in "The Milky Way and Theory of Gases" used "dark matter", or "matière obscure"--Wikipedia in French, in discussing Kelvin's work. [\] STEBBINS, Joel. "A Methof of Determining the Heights of Migrating Birds", PAYNE, W.W. "The System of the Stars", PAYNE, "The Size of the Stars", PAYNE, W.W. "The Markings of the Satellites of Jupiter" WALL, E.J., "The Use of the Spectroscope", PARKHURST. "Astronomical Photography with Reflecting Telescopes", and numerous other papers. Monthly sections: variables stars, Comet Notes, and Planet Notes.…