Jump to content

File:Saturn ring spokes PIA11144 secs15.5to23 20080926.ogv

This file was selected for display on the Main Page as the medium of the day. Click here for more information.
From Wikimedia Commons, the free media repository

Original file (Ogg Theora video file, length 7.5 s, 1,016 × 1,016 pixels, 475 kbps, file size: 435 KB)

Captions

Captions

Add a one-line explanation of what this file represents
Description
English: Dark spokes dance around Saturn's B ring in this series of movies comprised of images taken with Cassini's wide-angle camera.

This full size animation is from the sequence taken on 26 September 2008: 15.5 to 23 seconds extracted from a concatenation of spoke movies acquired by NASA's Cassini spacecraft.

As Saturn nears equinox in August 2009 and the sun angle on the ring plane decreases, spokes become common sights in Cassini images, just as they were in Voyager images. The planet's orbital period is 29.5 years, so Saturn has nearly made one complete trip around the sun since the flybys of the two Voyager spacecraft in 1980 and 1981, allowing Cassini to closely match Voyager's viewing geometry.

This movie shows the sunlit side of the rings at low solar phase, or spacecraft-rings-sun, angles. The spokes appear dark against Saturn's B ring at low phase angles because the particles within them scatter light more efficiently in the forward direction (away from Cassini) than the surrounding larger ring particles. In the opposite viewing geometry, at high phase angles, spokes appear bright relative to surrounding ring particles.
Українська: Темні спиці танцюють навколо кільця B Сатурна в цій серії фільмів, що складається із зображень, зроблених за допомогою ширококутної камери Кассіні.
Date 26 September 2008
Source http://photojournal.jpl.nasa.gov/catalog/PIA11144 (MOV video)
Author NASA/JPL/Space Science Institute
Other versions
  • 21 August 2008 sequence: 7.5 seconds at 300 pixels and low bitrate of 51kbps
  • 19 September 2008 sequence: 7 seconds at 300 pixels and low bitrate of 48kbps
  • 26 September 2008 sequence: 7.5 seconds at 300 pixels and low bitrate of 48kbps
  • 11 October 2008 sequence: 10 seconds at 300 pixels and low bitrate of 39kbps
  • 25 November 2008 sequence: 10 seconds at 300 pixels and low bitrate of 52kbps
  • 21 August 2008 sequence: 7.5 seconds at full size and bitrate of 528kbps
  • 19 September 2008 sequence: 7 seconds at full size and bitrate of 545kbps
  • 26 September 2008 sequence: 7.5 seconds at full size and bitrate of 471kbps
  • 11 October 2008 sequence: 10 seconds at full size and bitrate of 470kbps
  • 25 November 2008 sequence: 10 seconds at full size and bitrate of 372kbps
  • All five sequences together at full 1016×1016 pixels size: length 44s, 1,888kbps

Assessment

[edit]
Media of the day This file was selected as the media of the day for 01 March 2025. It was captioned as follows:
English: Dark spokes dance around Saturn's B ring in this series of movies comprised of images taken with Cassini's wide-angle camera.
Other languages
Deutsch: Dunkle Speichen tanzen um den B-Ring des Saturns in dieser Bildserie, die aus Bildern der Cassini-Weitwinkelkamera besteht.
English: Dark spokes dance around Saturn's B ring in this series of movies comprised of images taken with Cassini's wide-angle camera.
Українська: Темні спиці танцюють навколо кільця B Сатурна в цій серії фільмів, що складається із зображень, зроблених за допомогою ширококутної камери Кассіні.

Licensing

[edit]
Public domain This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.)
Warnings:

See File:Saturn ring spokes PIA11144 300px secs0to7.5 20080821.ogv for details of how videos were extracted and converted to Theora OGG format.

File history

Click on a date/time to view the file as it appeared at that time.

Date/TimeThumbnailDimensionsUserComment
current18:41, 10 November 20097.5 s, 1,016 × 1,016 (435 KB)84user (talk | contribs){{Information |Description=Dark spokes dance around Saturn's B ring in this series of movies comprised of images taken with Cassini's wide-angle camera. This full size animation is from the sequence

You cannot overwrite this file.

Transcode status

Update transcode status
Format Bitrate Download Status Encode time
VP9 720P 213 kbps Completed 20:07, 18 October 2018 5.0 s
VP9 480P 106 kbps Completed 20:07, 18 October 2018 4.0 s
VP9 360P 57 kbps Completed 20:07, 18 October 2018 2.0 s
VP9 240P 32 kbps Completed 20:07, 18 October 2018 2.0 s
WebM 360P 311 kbps Completed 10:51, 20 November 2012 2.0 s
QuickTime 144p (MJPEG) 195 kbps Completed 21:37, 3 December 2024 1.0 s

File usage on other wikis

Metadata

This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.

Retrieved from "https://commons.wikimedia.org/w/index.php?title=File:Saturn_ring_spokes_PIA11144_secs15.5to23_20080926.ogv&oldid=1003708914"