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Topic: Saturn

NASA’s Cassini Spacecraft data gives new insights into Titan’s Lakes

 

NASA Headquarters

NASA - National Aeronautics and Space AdministrationWashington, D.C. – On its final flyby of Saturn’s largest moon in 2017, NASA’s Cassini spacecraft gathered radar data revealing that the small liquid lakes in Titan’s northern hemisphere are surprisingly deep, perched atop hills and filled with methane.

The new findings, published April 15th in Nature Astronomy, are the first confirmation of just how deep some of Titan’s lakes are (more than 300 feet, or 100 meters) and of their composition. They provide new information about the way liquid methane rains on, evaporates from and seeps into Titan – the only planetary body in our solar system other than Earth known to have stable liquid on its surface.

This near-infrared, color view from Cassini shows the sun glinting off of Titan's north polar seas. (NASA/JPL-Caltech/Univ. Arizona/Univ. Idaho)

This near-infrared, color view from Cassini shows the sun glinting off of Titan’s north polar seas. (NASA/JPL-Caltech/Univ. Arizona/Univ. Idaho)

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NASA’s Cassini spacecraft discovers tiny Moons coated from Saturn’s Rings

 

NASA Jet Propulsion Laboratory

NASA - National Aeronautics and Space AdministrationPasadena, CA – 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 28th. “We’re seeing more evidence of how extremely active and dynamic the Saturn ring and moon system is.”

This graphic shows the ring moons inspected by NASA's Cassini spacecraft in super-close flybys. The rings and moons depicted are not to scale. (NASA-JPL/Caltech)

This graphic shows the ring moons inspected by NASA’s Cassini spacecraft in super-close flybys. The rings and moons depicted are not to scale. (NASA-JPL/Caltech)

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NASA uses Cassini Spacecraft data to determine length of a Day on Saturn

 

NASA Jet Propulsion Laboratory

NASA - National Aeronautics and Space AdministrationPasadena, CA – 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.

A view from NASA's Cassini spacecraft shows Saturn's northern hemisphere in 2016 as that part of the planet nears its northern hemisphere summer solstice. A year on Saturn is 29 Earth years; days only last 10:33:38, according to a new analysis of Cassini data. (NASA/JPL-Caltech/Space Science Institute)

A view from NASA’s Cassini spacecraft shows Saturn’s northern hemisphere in 2016 as that part of the planet nears its northern hemisphere summer solstice. A year on Saturn is 29 Earth years; days only last 10:33:38, according to a new analysis of Cassini data. (NASA/JPL-Caltech/Space Science Institute)

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NASA’s Cassini Spacecraft Data reveals Saturn’s Rings may have formed much later than the Planet

 

NASA Jet Propulsion Laboratory

NASA - National Aeronautics and Space AdministrationPasadena, CA – The rings of Saturn may be iconic, but there was a time when the majestic gas giant existed without its distinctive halo. In fact, the rings may have formed much later than the planet itself, according to a new analysis of gravity science data from NASA’s Cassini spacecraft.

The findings indicate that Saturn’s rings formed between 10 million and 100 million years ago. From our planet’s perspective, that means Saturn’s rings may have formed during the age of dinosaurs.

An artist's concept of the Cassini orbiter crossing Saturn's ring plane. New measurements of the rings' mass give scientists the best answer yet to the question of their age. (NASA/JPL-Caltech)

An artist’s concept of the Cassini orbiter crossing Saturn’s ring plane. New measurements of the rings’ mass give scientists the best answer yet to the question of their age. (NASA/JPL-Caltech)

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NASA explains why it’s important to study Space Rocks

 

NASA’s Jet Propulsion Laboratory

NASA - National Aeronautics and Space AdministrationPasadena, CA – NASA says the entire history of human existence is a tiny blip in our solar system’s 4.5-billion-year history. No one was around to see planets forming and undergoing dramatic changes before settling in their present configuration. In order to understand what came before us — before life on Earth and before Earth itself — scientists need to hunt for clues to that mysterious distant past.

Those clues come in the form of asteroids, comets and other small objects. Like detectives sifting through forensic evidence, scientists carefully examine these small bodies for insights about our origins.

The small worlds of our solar system help us trace its history and evolution, including comets. (NASA/JPL-Caltech/UMD)

The small worlds of our solar system help us trace its history and evolution, including comets. (NASA/JPL-Caltech/UMD)

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NASA has perfect landing spot picked out for Mars InSight Lander

 

Written by DC Agle
NASA’s Jet Propulsion Laboratory

NASA - National Aeronautics and Space AdministrationPasadena, CA – No doubt about it, NASA explores some of the most awe-inspiring locations in our solar system and beyond. Once seen, who can forget the majesty of astronaut Jim Irwin standing before the stark beauty of the Moon’s Hadley Apennine mountain range, of the Hubble Space Telescope’s gorgeous “Pillars of Creation” or Cassini’s magnificent mosaic of Saturn?

Mars also plays a part in this visually compelling equation, with the high-definition imagery from the Curiosity rover of the ridges and rounded buttes at the base of Mount Sharp bringing to mind the majesty of the American Southwest. That said, Elysium Planitia – the site chosen for the November 26th landing of NASA’s InSight mission to Mars – will more than likely never be mentioned with those above because it is, well, plain.

This artist's concept depicts the smooth, flat ground that dominates InSight's landing ellipse in the Elysium Planitia region of Mars. (NASA/JPL-Caltech)

This artist’s concept depicts the smooth, flat ground that dominates InSight’s landing ellipse in the Elysium Planitia region of Mars. (NASA/JPL-Caltech)

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Final orbits of NASA’s Cassini Spacecraft produces new understanding of Saturn

 

NASA’s Jet Propulsion Laboratory

NASA - National Aeronautics and Space AdministrationPasadena, CA – New research emerging from the final orbits of NASA’s Cassini spacecraft represents a huge leap forward in our understanding of the Saturn system — especially the mysterious, never-before-explored region between the planet and its rings. Some preconceived ideas are turning out to be wrong while new questions are being raised.

Six teams of researchers are publishing their work October 5th in the journal Science, based on findings from Cassini’s Grand Finale. That’s when, as the spacecraft was running out of fuel, the mission team steered Cassini spectacularly close to Saturn in 22 orbits before deliberately vaporizing it in a final plunge into the atmosphere in September 2017.

Illustration: NASA's Cassini spacecraft in orbit around Saturn. (NASA/JPL-Caltech Credit: NASA/JPL-Caltech)

Illustration: NASA’s Cassini spacecraft in orbit around Saturn. (NASA/JPL-Caltech Credit: NASA/JPL-Caltech)

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NASA to start searching Universe for signs of Technological Life

 

NASA Headquarters

NASA - National Aeronautics and Space AdministrationWashington, D.C. – Since the beginning of civilization, humanity has wondered whether we are alone in the universe. As NASA has explored our solar system and beyond, it has developed increasingly sophisticated tools to address this fundamental question.

Within our solar system, NASA’s missions have searched for signs of both ancient and current life, especially on Mars and soon, Jupiter’s moon Europa. Beyond our solar system, missions, such as Kepler and TESS, are revealing thousands of planets orbiting other stars. 

A zoom into the Hubble Space Telescope photograph of an enormous, balloon-like bubble being blown into space by a super-hot, massive star. Astronomers trained the iconic telescope on this colorful feature, called the Bubble Nebula, or NGC 7635. (NASA, ESA, and the Hubble Heritage Team (STScI/AURA), F. Summers, G. Bacon, Z. Levay, and L. Frattare (Viz 3D Team, STScI))

A zoom into the Hubble Space Telescope photograph of an enormous, balloon-like bubble being blown into space by a super-hot, massive star. Astronomers trained the iconic telescope on this colorful feature, called the Bubble Nebula, or NGC 7635. (NASA, ESA, and the Hubble Heritage Team (STScI/AURA), F. Summers, G. Bacon, Z. Levay, and L. Frattare (Viz 3D Team, STScI))

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NASA’s Cassini Spacecraft data reveals Dust Storms on Saturn’s moon Titan

 

NASA’s Jet Propulsion Laboratory

NASA - National Aeronautics and Space AdministrationPasadena, CA – Data from NASA’s Cassini spacecraft has revealed what appear to be giant dust storms in equatorial regions of Saturn’s moon Titan. The discovery, described in a paper published on September 24th, 2018 in Nature Geoscience, makes Titan the third Solar System body, in addition to Earth and Mars, where dust storms have been observed.

The observation is helping scientists to better understand the fascinating and dynamic environment of Saturn’s largest moon.

Artist's concept of a dust storm on Titan. (IPGP/Labex UnivEarthS/University Paris Diderot – C. Epitalon & S. Rodriguez)

Artist’s concept of a dust storm on Titan. (IPGP/Labex UnivEarthS/University Paris Diderot – C. Epitalon & S. Rodriguez)

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NASA’s Cassini Spacecraft captured photos of Saturn’s moon Titan’s Northern Lakes and Seas before missions end

 

NASA’s Jet Propulsion Laboratory

NASA - National Aeronautics and Space AdministrationPasadena, CA – 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 September 11th, 2017. Four days later, Cassini was deliberately plunged into the atmosphere of Saturn.

Punga Mare (240 miles, or 390 kilometers, across) is seen just above the center of the mosaic, with Ligeia Mare (300 miles, or 500 kilometers, wide) below center and the vast Kraken Mare stretching off 730 miles (1,200 kilometers) to the left of the mosaic.

During NASA's Cassini mission's final distant encounter with Saturn's giant moon Titan, the spacecraft captured this view of the enigmatic moon's north polar landscape of lakes and seas, which are filled with liquid methane and ethane. (NASA/JPL-Caltech/SSI)

During NASA’s Cassini mission’s final distant encounter with Saturn’s giant moon Titan, the spacecraft captured this view of the enigmatic moon’s north polar landscape of lakes and seas, which are filled with liquid methane and ethane. (NASA/JPL-Caltech/SSI)

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