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Latest Larry W. Esposito Stories

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2008-09-23 08:55:00

Saturn's rings may be larger and older than originally thought, researchers said Tuesday. Research presented at the European Planetary Science Congress in Germany indicates that the rings may be billions of years old. Since the rings seem so vivid, several scientists had debated that they were younger than Saturn. A closer look at the rings shows that they are rougher than they appear from far away. "Because they are clumpy, the previous estimates of the mass of the rings are incorrect," said...

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2007-12-12 21:55:00

SAN FRANCISCO, Calif. - New observations by NASA's Cassini spacecraft indicate the rings of Saturn, once thought to have formed during the age of the dinosaurs, instead may have been created roughly 4.5 billion years ago, when the solar system was still under construction. Larry Esposito, principal investigator for Cassini's Ultraviolet Imaging Spectrograph at the University of Colorado, Boulder, said data from NASA's Voyager spacecraft in the 1970s, and later from NASA's Hubble Space...

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2007-10-24 15:38:11

A narrow belt harboring moonlets as large as football stadiums discovered in Saturn's outermost ring probably resulted when a larger moon was shattered by a wayward asteroid or comet eons ago, according to a University of Colorado at Boulder study. Images taken by a camera onboard the NASA Cassini spacecraft revealed a series of eight propeller-shaped "wakes" in a thin belt of the outermost "A" ring, indicating the presence of corresponding moonlets, said CU-Boulder Research Associate...

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2007-05-22 12:25:00

Saturn's largest and most densely packed ring is composed of tightly packed clumps of particles separated by nearly empty gaps, according to new findings from NASA's Cassini spacecraft. These clumps in Saturn's B ring are neatly organized and constantly colliding, which surprised scientists. "The rings are different from the picture we had in our minds. We originally thought we would see a uniform cloud of particles. Instead we find that the particles are clumped together with empty spaces...

2006-04-06 12:02:07

Views of Saturn's stunning ring system from above by the Cassini-Huygens spacecraft now orbiting the planet indicate the prominent A ring contains more debris than once thought, according to a new University of Colorado at Boulder study. Previous observations with the Voyager spacecraft in the early 1980s found the ring was more transparent, indicating less material, said Joshua Colwell of CU-Boulder's Laboratory for Atmospheric and Space Physics. But new calculations based on May 2005...

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2005-09-07 07:54:51

NASA -- New observations from the Cassini spacecraft now at Saturn indicate the particles comprising one of its most prominent rings are trapped in ever-changing clusters of debris that are regularly torn apart and reassembled by gravitational forces from the planet. According to University of Colorado at Boulder Professor Larry Esposito of the Laboratory for Atmospheric and Space Physics, particle clusters in the outermost main ring, the A ring, range from the size of sedans to moving vans...

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2005-08-06 15:40:00

New images of Saturn obtained by a University of Colorado at Boulder-led team on June 21 using an instrument on the Cassini spacecraft show auroral emissions at its poles similar to Earth's Northern Lights. Taken with the Ultraviolet Imaging Spectrograph aboard the Cassini orbiter, the two UV images, invisible to the human eye, are the first from the Cassini-Huygens mission to capture the entire "oval" of the auroral emissions at Saturn's south pole. They also show similar emissions at...

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2005-08-05 12:48:48

JPL -- New images of Saturn obtained by a University of Colorado at Boulder-led team on June 21 using an instrument on the Cassini spacecraft show auroral emissions at its poles similar to Earth's Northern Lights. Taken with the Ultraviolet Imaging Spectrograph aboard the Cassini orbiter, the two UV images, invisible to the human eye, are the first from the Cassini-Huygens mission to capture the entire "oval" of the auroral emissions at Saturn's south pole. They also show similar emissions...

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2005-01-10 08:00:21

Ultraviolet images of Saturn's rings indicates much of the system is filled with ice, as well as atoms derived from water. A cloud of oxygen extends millions of miles outward from Saturn, which may hint at collisions between unseen icy moons. Astrobiology Magazine -- Ice particles are key players in the ever-changing panorama at Saturn, according to a new study led by a University of Colorado at Boulder professor using an instrument on the Cassini-Huygens spacecraft now at the ringed...

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2004-12-17 08:25:00

JPL -- Cassini's second close flyby of Titan completes a 'before' and 'after' look at the fuzzy moon and provides the first direct evidence of changing weather patterns in the skies over Titan. In images obtained less than two months ago, the Titan skies were cloud free, except for a patch of clouds observed over the moon's south pole. In images taken Monday, Dec. 13, during Cassini's second close flyby of Titan, several extensive patches of clouds have formed. "We see for the first time...


Word of the Day
negawatt
  • A unit of saved energy.
Coined by Amory Lovins, chairman of the Rocky Mountain Institute as a contraction of negative watt on the model of similar compounds like megawatt.