Astronomy and Astrophysics Volume 1

Astronomy and Astrophysics Volume 1

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1883 edition. Excerpt: ...is fainter than in 1878, stronger than in 1871. An intensification ot' the absorption lines was observed in group B. at the moon's edge, by TREPIED and Tirol.LON. The whole spectrum with blue lines on a continuous background has been photographed. Prominences photographed with the prismatic camera (showing. of course, ring spectrum). Three photographs were taken of the corona. The comet close to the sun was photographed with the prismatic and also ordinary cameras." DANIEL Kmuwoon has, for years, held the theory that there must be gaps or vacant spaces in the planetary zone betreen Mm-s and Jupiter. This hypothesis was suggested when the number of the minor planets was small, and hence it could in no way be verified. His reasoning was this, "If the Sun, once extended to the outer limit of the Asteroid Zone, and the minor planets were originally separated from its equator, it is obvious that at the distance of 3.27, when the period would be one-half that of J upiter, the perturbation by the latter planet would be extraordinary, gradually increasing the planetoid's eccentricity. Minor planets having this mean distance, or very near it, would thus in peri helion pass through the outer strata of the solar atmosphere. As a consequence of such motion in. a resisting medium, some planetoids might be reincorporated with the central mass, while the orbits of others would gradually contract until the decreasing solar radius would leave them without further sensible resistance. Hence a chasm in the ring would be the obvious result." This theory is sustained by recent important French and English publications, from which the following facts are taken: 1. The chasm at the dismnce 3.37 has immediately interior to it a...show more

Product details

  • Paperback | 128 pages
  • 189 x 246 x 7mm | 240g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236773772
  • 9781236773777