File:PIA07712 - F ring animation.gif

此為最大尺寸。

PIA07712_-_F_ring_animation.gif ‎（450 × 450 像素，檔案大小：3.43 MB，MIME 類型：image/gif、循環、65 畫格、26秒）

本檔案並非來自中文維基百科，而是來自維基共享資源。請參閱維基共享資源上的詳細描述、討論頁、頁面歷史、日誌。

維基共享資源是一個儲存自由版權作品的計畫。您可以向此計畫作出貢獻。

摘要

描述PIA07712 - F ring animation.gif	This movie sequence from Cassini shows dark drapes in the inner strands of the F ring caused by the gravitational influence of the shepherd moon Prometheus (102 kilometers, 63 miles across). Prometheus appears first in the sequence, interior to the F ring, and Pandora (84 kilometers, 52 miles across) follows along outside of the ring. Radial structure in the bright core of the ring is visible throughout the movie. Prometheus orbits closer to Saturn, and thus faster, than the icy particles that make up the F ring. The moon passes comes closest to the ring at “apoapse”, when it is farthest from Saturn. It is during these apoapse passages that Prometheus has its greatest influence on the fine ring material. With time, the ring material previously affected falls behind so that on the next apoapse passage of Prometheus, a new gore in the inner ring material is made. The material closer to Prometheus orbits the planet faster than the material closer to the bright F ring core. The gores, together with the sheared-out material due to differential orbital motion, create the dark, diagonal drapes. Several background stars are seen moving across the field during the movie. The visible light images in this sequence were acquired using the narrow angle camera on April 13, 2005 from a distance of approximately 1.2 million kilometers (700,000 miles) from Saturn. The Cassini-Huygens mission is a cooperative project of NASA, the European Space Agency and the Italian Space Agency. The Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, manages the Cassini-Huygens mission for NASA's Science Mission Directorate, Washington, D.C. The imaging team consists of scientists from the US, England, France, and Germany. The imaging operations center and team lead (Dr. C. Porco) are based at the Space Science Institute in Boulder, Colo. For more information about the Cassini-Huygens mission, visit http://saturn.jpl.nasa.gov and the Cassini imaging team home page, http://ciclops.org. This is a truncation of NASA's half-size animated gif version of the sequence. The full size image sequence is also available at http://photojournal.jpl.nasa.gov/animation/PIA07712.
日期	2005年4月13日
來源	http://ciclops.org/view.php?id=1361
作者	NASA/JPL/Space Science Institute
其他版本	Low quality OGG Theora video at one frame per second Low quality OGG Theora video at 2.5 frames per second Low quality OGG Theora video at 5 frames per second Medium quality OGG Theora video at 5 frames per second Full quality OGG Theora video at 2.5 frames per second Full quality OGG Theora video at 25 frames per second

本圖像或影音收錄於美國國家航空暨太空總署（NASA）噴射推進實驗室（Jet Propulsion Laboratory），其照片編號為： PIA07712

此標籤不表示文件的著作權狀態。任何文件在附有此標籤的同時還需要一個有效的著作權標籤。請參閱許可協議說明頁面以了解更多資訊。

其他語言：

العربية ∙ беларуская (тарашкевіца) ∙ български ∙ català ∙ čeština ∙ dansk ∙ Deutsch ∙ English ∙ español ∙ فارسی ∙ français ∙ galego ∙ magyar ∙ հայերեն ∙ Bahasa Indonesia ∙ italiano ∙ 日本語 ∙ македонски ∙ മലയാളം ∙ Nederlands ∙ polski ∙ português ∙ русский ∙ sicilianu ∙ slovenščina ∙ Türkçe ∙ українська ∙ 简体中文 ∙ 繁體中文 ∙ +/−

Derivative works of this file:

授權條款

	本作品由NASA創作，屬於公有領域。根據NASA的版權政策：“NASA的創作除非另有聲明否則不受版權保護。”（參見：Template:PD-USGov/zh，NASA版權政策或JPL圖像使用政策）
	警告: 使用NASA的logo，徽標等受到美國法律14 CFR 1221的限制。 NASA網站還提供大量來自蘇聯/俄羅斯航天機構，以及其他非美國的太空機構的圖像。這些圖像不一定屬於公有領域。根據哈勃空間望遠鏡的數據制作的素材，如果不是明確聲明由STScI提供，則可能受到版權保護。[1] 參看{{PD-Hubble}}和{{Cc-Hubble}}或{{Spacetelescope.org}}。 SOHO (ESA & NASA)聯合項目的探測器所創作的所有內容受到著作權保護，並且進行非教育性質的商業應用需要授權。[2] 每日一天文圖（APOD）網站的特色圖片可能受到著作權保護。[3]

檔案歷史

點選日期/時間以檢視該時間的檔案版本。

	日期/時間	尺寸	使用者	備⁠註
目前	2007年11月24日 (六) 19:51	450 × 450（3.43 MB）	WolfmanSF	Reduce file size by deleting alternate frames. Double delay setting to maintain speed of animation.
	2007年11月23日 (五) 09:48	450 × 450（6.44 MB）	WolfmanSF	truncate down to 122 frames
	2007年11月23日 (五) 02:00	450 × 450（6.91 MB）	WolfmanSF	further truncation down to 131 frames
	2007年11月22日 (四) 09:02	450 × 450（7.12 MB）	WolfmanSF
	2007年11月21日 (三) 10:01	450 × 450（9.01 MB）	WolfmanSF	{{Information \|Description=This movie sequence from Cassini shows dark drapes in the inner strands of the F ring caused by the gravitational influence of the shepherd moon Prometheus (102 kilometers, 63 miles across). Prometheus appears first in the sequ