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Cassini radar sees sand dunes in Belet on Saturn's giant moon Titan (lower photo) that are sculpted like Namibian sand dunes on Earth (upper photo). The bright features in the lower radar photo are not clouds but topographic features among the dunes. (Credit: NASA/JSC - uppper photo; NASA/JPL - lower photo) Mona Evans, "Titan - Planet-sized Moon of Saturn" http://www.bellaonline.com/articles/art182860.asp

Cassini radar sees sand dunes in Belet on Saturn's giant moon Titan (lower photo) that are sculpted like Namibian sand dunes on Earth (upper photo). The bright features in the lower radar photo are not clouds but topographic features among the dunes. (Credit: NASA/JSC - uppper photo; NASA/JPL - lower photo) Mona Evans, "Titan - Planet-sized Moon of Saturn" http://www.bellaonline.com/articles/art182860.asp

Titan. Mosaic of near-infrared images from Cassini, showing lakes on Titan’s north pole. They are the dark splotches and speckles scattered around the pole. Titan’s lakes are filled with liquid methane and ethane, organic compounds which are gases on Earth but liquids on cold Titan (-180º C). (Credit: (NASA/JPL-Caltech/SSI) ) Mona Evans, "10 Amazing Facts about Saturn's Moons" http://www.bellaonline.com/articles/art28136.asp

Titan. Mosaic of near-infrared images from Cassini, showing lakes on Titan’s north pole. They are the dark splotches and speckles scattered around the pole. Titan’s lakes are filled with liquid methane and ethane, organic compounds which are gases on Earth but liquids on cold Titan (-180º C). (Credit: (NASA/JPL-Caltech/SSI) ) Mona Evans, "10 Amazing Facts about Saturn's Moons" http://www.bellaonline.com/articles/art28136.asp

Saturn's moon Iapetus, showing the bright trailing hemisphere. Part of the dark area appears on the right - the equatorial ridge is in profile on the right limb. The large crater Engelier is near the bottom; to its lower right is the rim of the partly obliterated, Gerin. (Cassini mosaic) Mona Evans, "10 Amazing Facts about Saturn's Moons" http://www.bellaonline.com/articles/art28136.asp

Saturn's moon Iapetus, showing the bright trailing hemisphere. Part of the dark area appears on the right - the equatorial ridge is in profile on the right limb. The large crater Engelier is near the bottom; to its lower right is the rim of the partly obliterated, Gerin. (Cassini mosaic) Mona Evans, "10 Amazing Facts about Saturn's Moons" http://www.bellaonline.com/articles/art28136.asp

Enceladus Jets: The icy surface of Saturn's moon Enceladus spurts ice particles, water vapor, and trace organic molecules into space. Intriguing to astrobiologists, Enceladus could be one of the best places to look for evidence of life in our Solar System. (Image Credit: NASA/JPL/Space Science Institute) Mona Evans, "10 Amazing Facts about Saturn's Moons" http://www.bellaonline.com/articles/art28136.asp

Enceladus Jets: The icy surface of Saturn's moon Enceladus spurts ice particles, water vapor, and trace organic molecules into space. Intriguing to astrobiologists, Enceladus could be one of the best places to look for evidence of life in our Solar System. (Image Credit: NASA/JPL/Space Science Institute) Mona Evans, "10 Amazing Facts about Saturn's Moons" http://www.bellaonline.com/articles/art28136.asp

Saturn's shadows. (Credit: NASA/JPL/Space Science Institute) The moon Mimas is in the foreground. The blue backdrop isn't Saturn's rings. It's the shadows of the rings on the planet's northern hemisphere. When Cassini first went into orbit around Saturn the far north did look blue, but seasonal changes turned that into a golden hue. Mona Evans, "Cassini Mission and Website" http://www.bellaonline.com/articles/art23637.asp

Saturn's shadows. (Credit: NASA/JPL/Space Science Institute) The moon Mimas is in the foreground. The blue backdrop isn't Saturn's rings. It's the shadows of the rings on the planet's northern hemisphere. When Cassini first went into orbit around Saturn the far north did look blue, but seasonal changes turned that into a golden hue. Mona Evans, "Cassini Mission and Website" http://www.bellaonline.com/articles/art23637.asp

▶ Rhea Transits Saturn - YouTube (Credit: Cassini Imaging Team, SSI, JPL, ESA, NASA) The slim crescent of the moon Rhea transits a crescent Saturn. In an interplay of contrast and shadow, the moon goes dark against the planet, and then its crescent suddenly brightens as it slips in front of Saturn's night side. The view is edge-on to the rings, which you can see as a dark line. Mona Evans, “Rhea Moon of Saturn” http://www.bellaonline.com/articles/art56119.asp

▶ Rhea Transits Saturn - YouTube (Credit: Cassini Imaging Team, SSI, JPL, ESA, NASA) The slim crescent of the moon Rhea transits a crescent Saturn. In an interplay of contrast and shadow, the moon goes dark against the planet, and then its crescent suddenly brightens as it slips in front of Saturn's night side. The view is edge-on to the rings, which you can see as a dark line. Mona Evans, “Rhea Moon of Saturn” http://www.bellaonline.com/articles/art56119.asp

Dione (false-color image) 2005. Fourth-largest moon of Saturn, orbiting at about the same distance as our Moon orbits Earth. It has a varied terrain, is probably made mostly of water ice with a rocky core, and has a tenuous atmosphere. (Image: NASA/JPL/SSI) ©Mona Evans, "10 Amazing Facts about Saturn's Moons" http://www.bellaonline.com/articles/art28136.asp

Dione (false-color image) 2005. Fourth-largest moon of Saturn, orbiting at about the same distance as our Moon orbits Earth. It has a varied terrain, is probably made mostly of water ice with a rocky core, and has a tenuous atmosphere. (Image: NASA/JPL/SSI) ©Mona Evans, "10 Amazing Facts about Saturn's Moons" http://www.bellaonline.com/articles/art28136.asp

Saturn & Titan, 08/2012) Natural color mosaic. (Credit: NASA/JPL-Caltech/SSI) It's spring in the northern hemisphere and autumn in the south. The blue color of the north is fading, but deepening in the south. The blue seems to be the result of the winter skies being less hazy so that, as on Earth, the blue part of the Sun's spectrum is scattered. The presence of methane adds to the effect. ©Mona Evans, "10 Amazing Facts about Saturn's Moons" http://www.bellaonline.com/articles/art28136.asp

Saturn & Titan, 08/2012) Natural color mosaic. (Credit: NASA/JPL-Caltech/SSI) It's spring in the northern hemisphere and autumn in the south. The blue color of the north is fading, but deepening in the south. The blue seems to be the result of the winter skies being less hazy so that, as on Earth, the blue part of the Sun's spectrum is scattered. The presence of methane adds to the effect. ©Mona Evans, "10 Amazing Facts about Saturn's Moons" http://www.bellaonline.com/articles/art28136.asp

Saturn’s moon Iapetus photographed by the Cassini spacecraft. The right side is overexposed because it’s illuminated by the Sun. The left side glows by light reflecting off Saturn’s clouds. Since sunlight is much fainter at Saturn’s distance than at Earth’s, Cassini had to make a long time exposure to capture this image. (Credit: NASA) Mona Evans, "Earthshine" http://www.bellaonline.com/articles/art301287.asp

Saturn’s moon Iapetus photographed by the Cassini spacecraft. The right side is overexposed because it’s illuminated by the Sun. The left side glows by light reflecting off Saturn’s clouds. Since sunlight is much fainter at Saturn’s distance than at Earth’s, Cassini had to make a long time exposure to capture this image. (Credit: NASA) Mona Evans, "Earthshine" http://www.bellaonline.com/articles/art301287.asp

Titan is the largest moon of Saturn. It is the only moon known to have a dense atmosphere,[10] and the only object in space other than Earth where clear evidence of stable bodies of surface liquid has been found.[11]

Titan is the largest moon of Saturn. It is the only moon known to have a dense atmosphere,[10] and the only object in space other than Earth where clear evidence of stable bodies of surface liquid has been found.[11]

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