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08-August-2006, 06:05 PM
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Rigel Passes Behind Saturn
NASA's Cassini spacecraft captured this image of the star Rigel passing behind Saturn's atmosphere. Rigel is well known to astronomers, as one of the brightest stars in the constellation of Orion. This event allows Cassini to measure the haze structure and opacity of Saturn's upper atmosphere as the star is dimmed. Cassini took this image on June 30, 2004 when it was 446,000 kilometers (277,000 miles) from Saturn.
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