File:Saturn ring spokes PIA11144 300px secs15.5to23 20080926.ogv

Saturn_ring_spokes_PIA11144_300px_secs15.5to23_20080926.ogv (Ogg Theora video file, length 7.5 s, 300 × 300 pixels, 52 kbps, file size: 47 KB) Dark spokes dance around Saturn's B ring in this series of movies comprised of images taken with Cassini's wide-angle camera.

This 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.

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