Saturn's comparatively paper-thin rings are tilted edge on to Earth every 15 years. Because the orbits of Saturn's major moons are in the ring plane, too, this alignment gives astronomers a rare opportunity to capture a truly spectacular parade of moons crossing the face of Saturn. 
<p>This picture sequence was taken with the Hubble Space Telescope on February 24, 2009, when Saturn was at a distance of roughly 775 million miles (1.25 billion kilometers) from Earth. Hubble can see details as small as 190 miles (300 km) across on Saturn.
</p><p>For more information, visit: hubblesite.org/image/2514/news_release/2009-12
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Credit: NASA, ESA, and the Hubble Heritage Team (STScI/AURA); Acknowledgment: M.H. Wong (STScI/UC Berkeley) and C. Go (Philippines)
NASA Hubble
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