Astronomical, Magnetic and Meteorological Observations Made at the United States Naval Observatory Volume 2

Astronomical, Magnetic and Meteorological Observations Made at the United States Naval Observatory Volume 2

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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. 1880 edition. Excerpt: ...the telescope so as to have the moon just outside the field, the luminous wings still reached the opposite side of the field, although they were fainter at this distance, but still perfectly visible. From this observation it appears that these appendages extended at least i 33' from the limb of the moon. I did not try to see how far they could be traced with the telescope, but it is certain that they extended much beyond that distance. The common axis of the two appendages was as a whole parallel to the ecliptic, although the west wing was not strictly speaking a prolongation of the eastern, as it clearly made a slight angle with it, being a little tipped to the ecliptic, while the other was very nearly parallel to it. A straight line drawn from the summit of the two opposite wings would have passed at a little distance to the north of the sun's center. At their base they differed much in width, the eastern one being the narrowest and occupying about 70 on the moon's limb, extending from about 60 to 130. 'lhe western. wing had its base broader and extended about 6' in the south, beyond the moon s limb, where it rested on a beam of light situated at about 2 I 5, and which diverged from this point. Towards the north it began at about 3 30, and occupied about ii 5 on the limb, its whole width being very nearly equal to the diameter of the moon. The forni of both wings was evidently conical, and this, with the outline of their edges slightly curved outwards, and the soft pearly light they emitted, at once suggested the zodiacal light when seen under very favorable circumstances; with the remarkable exception, however, that the zodiacal light has its edges dim and very d1fl'us6_d, while in these streamers they more

Product details

  • Paperback | 236 pages
  • 189 x 246 x 13mm | 426g
  • United States
  • English
  • black & white illustrations
  • 1236752597
  • 9781236752598