“Transparency of The Crape Ring of Saturn, and Other Peculiarities as Shown by The Observations of The Eclipse of Japetus on November 1st, 1889.”

Verlag: Astronomy and Astro-physics, 1892

  • Softcover
  • Gebraucht
Alle Details anzeigen

Anbieter: JF Ptak Science Books, Hendersonville, NC, USAJF Ptak Science Books

Verkäufer/-in mit 5 Sternen

AbeBooks-Verkäufer/-in seit 28. Juni 2016

Artikel dieses Verkäufers ansehen
Softcover

Zustand: Gebraucht - Befriedigend

EUR 128,60

EUR 5,17 Versand 
Versand innerhalb von USA

Anzahl: 1 verfügbar

In den Warenkorb
Kostenlose Rückgaben innerhalb von 30 Tagen

Artikelbeschreibung vom Verkäufer

Original offprint Astronomy and Astro-physics, No. 102, W.W. Payne & George E. Hale.(the previous incantation of this journal for the preceding ten volumes was the Sidereral Messenger). 9X6” (two illustrations), 4pp. Inscribed “from the author”. Condition: nice copy, Good/Very Good, though a little tender. Scarce. “Barnard saw the gegenschein in 1882, not aware of earlier papers by Theodor Brorsen and T. W. Backhouse.  In 1889 he observed the moon Iapetus pass behind Saturn's rings. As he watched Iapetus pass through the space between Saturn's innermost rings and the planet itself, he saw a shadow pass over the moon. Although he did not realize it at the time, he had discovered proof of the "spokes" of Saturn, dark shadows running perpendicular to the circular paths of the rings. These spokes were doubted at first, but confirmed by the spacecraft Voyager 1.”--Wikipedia __+__“The conjecture that Barnard saw spoke shadows on Iapetus contradicts modern scientific understanding of where spokes occur. It is otherwise consistent with the normal optical depth of spokes, their increased contrast at small ring opening angles, and their ability to cover long radial distances and broad areas. It appears to be consistent with observations of transitory dark markings on the C ring in the late 1880s as well as with a similar case in 1992. See Figure 13 for an observation made by Stroobant a few months after the eclipse of Iapetus. However, even if this interpretation is wrong, I urge that two aspects of Barnard’s observation are significant. He saw Iapetus begin to fade before it reached the C-D ring boundary. He also saw Iapetus become fainter than Enceladus too soon. Apparently, a condition existed in the inner ring system on 1-2 November 1889 that does not, for whatever reason, exist now.”-- James Bryan, “E.E. BARNARD AND THE ECLIPSE OF IAPETUS IN 1889”, in Journal of Astronomical History and Heritage, 10(1), 31-48 (2007).

Bestandsnummer des Verkäufers ABE-1514904685363

Bibliografische Details

Titel
“Transparency of The Crape Ring of Saturn, and Other Peculiarities as Shown by The Observations of The Eclipse of Japetus on November 1st, 1889.”
Autor
Barnard, E.E.
Verlag
Astronomy and Astro-physics
Veröffentlichungsjahr
1892
Zustand
Good
Einband
Soft cover
Verkäuferkataloge
Astrophysics

JF Ptak Science Books

Hendersonville, NC, USA

Verkäufer/-in mit 5 Sternen

AbeBooks-Verkäufer/-in seit 28. Juni 2016

Versandkosten innerhalb von USA

Artikel5 bis 14 Werktage3 bis 6 Werktage
Erster ArtikelEUR 5,17EUR 11,62
Die Versandzeiten werden von den Verkäuferinnen und Verkäufern festgelegt. Sie variieren je nach Versanddienstleister und Standort. Sendungen, die den Zoll passieren, können Verzögerungen unterliegen. Eventuell anfallende Abgaben oder Gebühren sind von der Käuferin bzw. dem Käufer zu tragen. Die Verkäuferin bzw. der Verkäufer kann Sie bezüglich zusätzlicher Versandkosten kontaktieren, um einen möglichen Anstieg der Versandkosten für Ihre Artikel auszugleichen.

Zahlungsarten

  • Visa
  • Mastercard
  • American Express
  • Carte Bleue
  • Apple Pay
  • Google Pay
  • PayPal
  • Rechnung

Shop-Beschreibung

We have been in business since 1985--including a store in Georgetown, D.C. from 1985-2002--specializing in significant and hard-to-find works in modern (say, after 1850) physics, math, astronomy, and technology, and other bits and bobs. Shipping notice for overseas parcels: customs, VAT, and all other shipping fees and add-ons are the responsibility of the buyer.

Spezialisierung

Science

Unternehmensdaten der Verkäuferin bzw. des Verkäufers

JF Ptak Science Books

NC, USA