Image: F Ring Dynamism PIA08290

Description: The Cassini spacecraft has revealed a never-before-seen level of detail in Saturn's F ring, including evidence for the perturbing effect of small moonlets orbiting in or close to the ring's bright core. For some time, scientists have suspected the presence of tiny moonlets that orbit Saturn in association with the clumpy ring. As the small satellites move close to the F ring core they leave a gravitational signature. In some cases they can draw out material in the form of a "streamer"—a miniature version of the interaction Cassini has witnessed between Prometheus and the F ring material. The dynamics of this interaction are the same, but the scale is different. See PIA06143 for a view of Prometheus creating a streamer. Scientists speculate that there could be several small moons with a variety of sizes involved in the creation of structures like the one seen here. The image was taken in visible light with the Cassini spacecraft narrow-angle camera on Sept. 25, 2006 at a distance of approximately 255,000 kilometers (159,000 miles) from Saturn and at a Sun-Saturn-spacecraft, or phase, angle of 29 degrees. Scale in the original image was 1 kilometer (3,873 feet) per pixel. The image has been magnified by a factor of two and contrast enhanced.
Title: F Ring Dynamism PIA08290
Credit: NASA
Author: Cassini Spacecraft
Permission: 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: Use of NASA logos, insignia and emblems is restricted per U.S. law 14 CFR 1221. The NASA website hosts a large number of images from the Soviet/Russian space agency, and other non-American space agencies. These are not necessarily in the public domain. Materials based on Hubble Space Telescope data may be copyrighted if they are not explicitly produced by the STScI.[1] See also Template:PD-Hubble and Template:Cc-Hubble. The SOHO (ESA & NASA) joint project implies that all materials created by its probe are copyrighted and require permission for commercial non-educational use. [2] Images featured on the Astronomy Picture of the Day (APOD) web site may be copyrighted. [3] The National Space Science Data Center (NSSDC) site has been known to host copyrighted content even though its photo gallery FAQ states that all of the images in the photo gallery are in the public domain.
Usage Terms: Public domain
License: Public domain
Attribution Required?: No