The rings of Saturn have puzzled astronomers since Galileo Galilei discovered them with his telescope in 1610. Detailed study by the Voyager 1 and Voyager 2 spacecraft in the 1980s only increased the mystery.
There are billions of ring particles in the entire ring system. The ring particle sizes range from tiny, dust-sized icy grains to a few particles as large as mountains. Two tiny moons orbit in gaps (Encke and Keeler gaps) in the rings and keep the gaps open. Other particles (10s to 100s of meters) are too tiny to see, but create propeller-shaped objects in the rings that let us know they are there. The rings are believed to be pieces of comets, asteroids or shattered moons that broke up before they reached the planet. Each ring orbits at a different speed around the planet. Information from NASA’s Cassini mission will help reveal how they formed, how they maintain their orbit and, above all, why they are there in the first place.
Image Credit: NASA/JPL/Space Science Institute
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The Society of the Crossed Keys by Alexandre Desplat
From Wes Anderson’s The Grand Budapest Hotel
Picture: This breathtaking view from the Burj Khalifa, the world’s tallest building, shows a thick blanket of smoggy fog smothering Dubai. The mist almost completely covers the skyscrapers which dominate the skyline.
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Close-Up (1990, Abbas Kiarostami)
Death Is the Road to Awe | Clint Mansell | The Fountain
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Director Ingmar Bergman talks with Victor Sjöström during the making of Wild Strawberries.