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Saturn's Moons

Pictures related to my article "10 Amazing Facts about Saturn's Moons" at http://www.bellaonline.com/articles/art28136.asp.

Cassini image of Saturn's moon Hyperion. (Photo Credit: NASA/JPL) This moon that looks like a sponge is probably a fragment of a larger moon that broke up long ago. Mona Evans, "10 Amazing Facts about Saturn's Moons" www.bellaonline.c...

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" www.bellaonline.c...

Saturn’s shadows

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This illustration shows the various steps that lead to the formation of the aerosols that make up the haze on Titan, Saturn's largest moon. Mona Evans, "Titan - Planet-sized Moon of Saturn" www.bellaonline.c...

Prometheus and Pan, shepherd moons at work. Prometheus maintains a gap in the F ring (lower left) and Pan keeps the Encke gap open. You can see Pan in the center of the gap. The other bright object is a background star. Image taken 2012-09-18. (Image credit: NASA/JPL-Caltech/Space Science Institute) ©Mona Evans, "10 Amazing Facts about Saturn's Moons" www.bellaonline.c...

Saturn's moon Iapetus. Comparison of the two hemispheres. The dark terrain is called Cassini Regio after Jean Dominique Cassini. It's fairly smooth, showing that new material is being deposited which covers old cratering. (Credit: JPL NASA) Mona Evans, "10 Amazing Facts about Saturn's Moons" www.bellaonline.c...

Soaring Over Titan: Extraterrestrial Land of Lakes. Data from the Cassini spacecraft’s radar instrument was used for this 3-D flyover of the hydrocarbon lakes & seas at the north pole region, starting at Kraken Mare. The vertical heights are exaggerated tenfold and the data has been colorized, both for visual effect. (Credit: NASA/JPL-CalTech/ASI/USGS) Mona Evans, "Titan - Planet-sized Moon of Saturn" www.bellaonline.c...

Doom Mons. A mountain on Titan named after Mount Doom in "The Lord of the Rings" where Frodo destroys the ring of power and ends Sauron's reign. In order to see the location, you need to click on the image and go to the original site. (Coordinates on Titan: 14° 39′ 0″ S, 40° 25′ 12″ W)  (-14.65°, -40.42°) Mona Evans, "Titan - Planet-sized Moon of Saturn" www.bellaonline.c...

Ligeia Mare, second largest known body of liquid on Titan. (Image is artistically enhanced from NASA's Cassini mission) The lake is filled with liquid hydrocarbons, such as ethane and methane, and is one of the many seas and lakes that bejewel Titan's north polar region. (Photo credit: NASA/JPL-Caltech/ASI/Cornell) Mona Evans, "Titan - Planet-sized Moon of Saturn" www.bellaonline.c...

Titan's upper atmosphere (natural color). Here methane molecules are broken apart by solar UV light and the byproducts combine to form compounds like ethane and acetylene. The haze preferentially scatters blue and UV wavelengths of light. Lower in the atmosphere, the haze turns into a smog of complex organic molecules that absorbs about 90% of the visible light from the Sun. (Credit: JPL/NASA) Mona Evans, "Titan - Planet-sized Moon of Saturn" www.bellaonline.c...

Diagram of the internal structure of Titan according to the fully differentiated dense-ocean model. (Credit: Kelvinsong) Mona Evans, "Titan - Planet-sized Moon of Saturn" www.bellaonline.c...

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" www.bellaonline.c...

Titan, composite taken during Cassini flyby 2005-04-16, approximating what Titan would look like to the human eye: a hazy orange globe surrounded by a tenuous, bluish haze. The orange is due to hydrocarbon particles making up the haze, which was frustrating for scientists studying the NASA Voyager mission images in 1980-81. But Cassini can see through the haze in infrared. (Credit: NASA/JPL) Mona Evans, "10 Amazing Facts about Saturn's Moons" www.bellaonline.c...

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" www.bellaonline.c...

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" www.bellaonline.c...

Saturn's moon Iapetus. Discovered by Giovanni Cassini in 1671. It looks as if the moon is in shadow on the right hand side, but that is actually the dividing line between a bright hemisphere and one which is as dark as coal. (Photo: Images by Cassini probe 2004-12-31, Mosaic by Matt McIrvin) ©Mona Evans, "10 Amazing Facts about Saturn's Moons" www.bellaonline.c...

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" www.bellaonline.c...

This view shows the bright, icy Mimas in front of Saturn's delicate rings. (Image credit: NASA/JPL/SSI) Mona Evans, "10 Amazing Facts about Saturn's Moons" www.bellaonline.c...

Saturn's moon Helene. (Credit: NASA//JPL/SSI, image enhanced by Stu Atkinson) Mona Evans, "10 Amazing Facts about Saturn's Moons" www.bellaonline.c...

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" www.bellaonline.c...

Mimas, Pandora and rings. (Photo: NASA/JPL-Caltech/Space Science Institute) The smaller moon Pandora is about 40,000 km closer to Saturn than Mimas. We're looking across the ring plane. Both moons are stretched by Saturn's gravity and we're seeing the smaller end of Pandora. Mona Evans, "10 Amazing Facts about Saturn's Moons", www.bellaonline.c...