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Thread: Cassini and Saturn's moons

  1. #721
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    Somewhere..under the ring-bow...

  2. #722
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    Titans seas just like ours have a "sea level"

    https://www.jpl.nasa.gov/news/news.php?feature=7040

    Saturn's moon Titan may be nearly a billion miles away from Earth, but a recently published paper based on data from NASA's Cassini spacecraft reveals a new way this distant world and our own are eerily similar. Just as the surface of oceans on Earth lies at an average elevation that we call "sea level," Titan's seas also lie at an average elevation.

    This is the latest finding that shows remarkable similarities between Earth and Titan, the only other world we know of in our solar system that has stable liquid on its surface. The twist at Titan is that its lakes and seas are filled with hydrocarbons rather than liquid water, and water ice overlain by a layer of solid organic material serves as the bedrock surrounding these lakes and seas.

  3. #723
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    I'm not too surprised, it's not called sea- level for nothing.

  4. #724
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    Emily Lakdawalla on Jupiter's moon Lo taken by Cassini when it flew past Jupiter!!!

    http://www.planetary.org/blogs/emily...ty-plumes.html

    On this Moon Monday, I'm still catching up from the Lunar and Planetary Science Conference. So rather than dig into the data archives to make my own moon photo, I'm featuring an animation processed by Gordan Ugarkovic, showing Jupiter's volcanic moon Io with its prominent plumes. You can get a sense of how high the plumes reach above the surace as you watch Io rotate. The tops of the plumes rise from nighttime darkness into sunlight, so they remain visible on the night side of the moon.

  5. #725
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    Cassini data is still providing us new information long after its demise. Latest gem found whiten the data is the presence of large organic molecules on Enceladus.

    http://www.astronomy.com/news/2018/0...celadus-plumes

    A new analysis of data from NASA’s Cassini spacecraft indicates the presence of large organic molecules on Enceladus, something not found on the moon before.

    Using two instruments aboard the now-perished orbiter, an international team of researchers looked at molecules erupting with plumes of water vapor streaming from beneath Enceladus’ surface. Though similar experiments have been performed in the past, this time, the researchers found organic molecules much bigger, and thus more complex, than any found before.

    The results appeared Wednesday in Nature.

  6. #726
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    "Cassini's Final View of Titan's Northern Lakes and Seas"

    https://www.jpl.nasa.gov/news/news.php?feature=7234

    During NASA's Cassini mission's final distant encounter with Saturn's giant moon Titan, the spacecraft captured the enigmatic moon's north polar landscape of lakes and seas, which are filled with liquid methane and ethane.

    They were captured on Sept. 11, 2017. Four days later, Cassini was deliberately plunged into the atmosphere of Saturn.
    I am because we are
    (African saying)

  7. #727
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    Cassini data on Titan reveals dust storms on the moon.

    http://www.spacedaily.com/reports/Du..._time_999.html

    Data from the international Cassini spacecraft that explored Saturn and its moons between 2004 and 2017 has revealed what appear to be giant dust storms in equatorial regions of Titan.

    The discovery, described in a paper published in Nature Geoscience, makes Titan the third body in the Solar System where dust storms have been observed - the other two are Earth and Mars.
    I am because we are
    (African saying)

  8. #728
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    Photos of Titan taken by Cassini shows rainfall on the north pole of Titan.

    http://www.spacedaily.com/reports/Ev..._Pole_999.html

    An image from the international Cassini spacecraft provides evidence of rainfall on the north pole of Titan, the largest of Saturn's moons. The rainfall would be the first indication of the start of a summer season in the moon's northern hemisphere.

    "The whole Titan community has been looking forward to seeing clouds and rains on Titan's north pole, indicating the start of the northern summer, but despite what the climate models had predicted, we weren't even seeing any clouds," said Rajani Dhingra, a doctoral student in physics at the University of Idaho in Moscow, and lead author of the new study accepted for publication in Geophysical Research Letters, a journal of the American Geophysical Union. "People called it the curious case of missing clouds."

    Dhingra and her colleagues identified a reflective feature near Titan's north pole on an image taken June 7, 2016, by Cassini's near-infrared instrument, the Visual and Infrared Mapping Spectrometer. The reflective feature covered approximately 46,332 square miles, roughly half the size of the Great Lakes, and did not appear on images from previous and subsequent Cassini passes.

    Analyses of the short-term reflective feature suggested it likely resulted from sunlight reflecting off a wet surface. The study attributes the reflection to a methane rainfall event, followed by a probable period of evaporation.

    "It's like looking at a sunlit wet sidewalk," Dhingra said.

    This reflective surface represents the first observations of summer rainfall on the moon's northern hemisphere. If compared to Earth's yearly cycle of four seasons, a season on Titan lasts seven Earth years. Cassini arrived at Titan during the southern summer and observed clouds and rainfall in the southern hemisphere.
    I am because we are
    (African saying)

  9. #729
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    Scientist studying data that Cassini has transmitted to earth, have figured out Saturn's day is 10 hours, 33 minutes and 38 seconds..

    http://www.spacedaily.com/reports/Sc...aturn_999.html

    Using new data from NASA's Cassini spacecraft, researchers believe they have solved a longstanding mystery of solar system science: the length of a day on Saturn. It's 10 hours, 33 minutes and 38 seconds.

    The figure has eluded planetary scientists for decades, because the gas giant has no solid surface with landmarks to track as it rotates, and it has an unusual magnetic field that hides the planet's rotation rate.

    The answer, it turned out, was hidden in the rings.
    I am because we are
    (African saying)

  10. #730
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    "New close-ups of the mini-moons in Saturn's rings"

    http://www.spacedaily.com/reports/Ne...rings_999.html

    New findings have emerged about five tiny moons nestled in and near Saturn's rings. The closest-ever flybys by NASA's Cassini spacecraft reveal that the surfaces of these unusual moons are covered with material from the planet's rings - and from icy particles blasting out of Saturn's larger moon Enceladus. The work paints a picture of the competing processes shaping these mini-moons.

    "The daring, close flybys of these odd little moons let us peer into how they interact with Saturn's rings," said Bonnie Buratti of NASA's Jet Propulsion Laboratory in Pasadena, California. Buratti led a team of 35 co-authors that published their work in the journal Science on March 28. "We're seeing more evidence of how extremely active and dynamic the Saturn ring and moon system is."
    I am because we are
    (African saying)

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