Clarksville, TN Online: News, Opinion, Arts & Entertainment.


Topic: NASA’s Cassini Spacecraft

NASA’s Cassini spacecraft takes first look at Saturn’s Atmosphere

 

Written by Preston Dyches
NASA’s Jet Propulsion Laboratory

NASA - National Aeronautics and Space AdministrationPasadena, CA – NASA’s Cassini spacecraft has sent to Earth its first views of Saturn’s atmosphere since beginning the latest phase of its mission. The new images show scenes from high above Saturn’s northern hemisphere, including the planet’s intriguing hexagon-shaped jet stream.

Cassini began its new mission phase, called its Ring-Grazing Orbits, on November 30th. Each of these weeklong orbits — 20 in all — carries the spacecraft high above Saturn’s northern hemisphere before sending it skimming past the outer edges of the planet’s main rings.

This view from NASA's Cassini spacecraft was obtained about half a day before its first close pass by the outer edges of Saturn's main rings during its penultimate mission phase. (NASA/JPL-Caltech/Space Science Institute)

This view from NASA’s Cassini spacecraft was obtained about half a day before its first close pass by the outer edges of Saturn’s main rings during its penultimate mission phase. (NASA/JPL-Caltech/Space Science Institute)

«Read the rest of this article»

Sections: Technology | No Comments
 

NASA’s Cassini spacecraft completes first dive into outer edges of Saturn’s Rings

 

Written by Preston Dyches
NASA’s Jet Propulsion Laboratory

NASA - National Aeronautics and Space AdministrationPasadena, CA – NASA’s Saturn-orbiting Cassini spacecraft has made its first close dive past the outer edges of Saturn’s rings since beginning its penultimate mission phase on November 30th.

Cassini crossed through the plane of Saturn’s rings on December 4th at 5:09am PST (8:09am EST) at a distance of approximately 57,000 miles (91,000 kilometers) above Saturn’s cloud tops. This is the approximate location of a faint, dusty ring produced by the planet’s small moons Janus and Epimetheus, and just 6,800 miles (11,000 kilometers) from the center of Saturn’s F ring.

This graphic shows the closest approaches of Cassini's final two orbital phases. Ring-grazing orbits are shown in gray (at left); Grand Finale orbits are shown in blue. The orange line shows the spacecraft's Sept. 2017 final plunge into Saturn. (NASA/JPL-Caltech)

This graphic shows the closest approaches of Cassini’s final two orbital phases. Ring-grazing orbits are shown in gray (at left); Grand Finale orbits are shown in blue. The orange line shows the spacecraft’s Sept. 2017 final plunge into Saturn. (NASA/JPL-Caltech)

«Read the rest of this article»

Sections: Technology | No Comments
 

NASA’s Cassini Spacecraft to begin first phase of it’s end mission

 

Written by Preston Dyches
NASA’s Jet Propulsion Laboratory

NASA - National Aeronautics and Space AdministrationPasadena, CA – A thrilling ride is about to begin for NASA’s Cassini spacecraft. Engineers have been pumping up the spacecraft’s orbit around Saturn this year to increase its tilt with respect to the planet’s equator and rings. And on November 30th, following a gravitational nudge from Saturn’s moon Titan, Cassini will enter the first phase of the mission’s dramatic endgame.

Launched in 1997, Cassini has been touring the Saturn system since arriving there in 2004 for an up-close study of the planet, its rings and moons. During its journey, Cassini has made numerous dramatic discoveries, including a global ocean within Enceladus and liquid methane seas on Titan.

This is an artists concept of the Cassini Spacecraft orbiting Saturn Orbit. (NASA/JPL)

This is an artists concept of the Cassini Spacecraft orbiting Saturn Orbit. (NASA/JPL)

«Read the rest of this article»

Sections: Technology | No Comments
 


NASA’s Cassini Spacecraft observes Methane Clouds moving across Saturn’s moon Titan

 

Written by Preston Dyches
NASA’s Jet Propulsion Laboratory

NASA - National Aeronautics and Space AdministrationPasadena, CA – NASA’s Cassini spacecraft watched clouds of methane moving across the far northern regions of Saturn’s largest moon, Titan, on October 29­­­­th and 30th, 2016.

Several sets of clouds develop, move over the surface and fade during the course of this movie sequence, which spans 11 hours, with one frame taken every 20 minutes. Most prominent are long cloud streaks that lie between 49 and 55 degrees north latitude.

New video shows bright clouds of methane drifting across Saturn's largest moon, Titan. (NASA/JPL-Caltech/Space Science Institute)

New video shows bright clouds of methane drifting across Saturn’s largest moon, Titan. (NASA/JPL-Caltech/Space Science Institute)

«Read the rest of this article»

Sections: Technology | No Comments
 

NASA’s Voyager 2 Spacecraft data suggests Uranus may have Two Additional Moons

 

Written by Elizabeth Landau
NASA’s Jet Propulsion Laboratory

NASA - National Aeronautics and Space AdministrationPasadena, CA – NASA’s Voyager 2 spacecraft flew by Uranus 30 years ago, but researchers are still making discoveries from the data it gathered then. A new study led by University of Idaho researchers suggests there could be two tiny, previously undiscovered moonlets orbiting near two of the planet’s rings.

Rob Chancia, a University of Idaho doctoral student, spotted key patterns in the rings while examining decades-old images of Uranus’ icy rings taken by Voyager 2 in 1986. He noticed the amount of ring material on the edge of the alpha ring — one of the brightest of Uranus’ multiple rings — varied periodically. A similar, even more promising pattern occurred in the same part of the neighboring beta ring.

Uranus is seen in this false-color view from NASA's Hubble Space Telescope from August 2003. The brightness of the planet's faint rings and dark moons has been enhanced for visibility. (NASA/Erich Karkoschka (Univ. Arizona))

Uranus is seen in this false-color view from NASA’s Hubble Space Telescope from August 2003. The brightness of the planet’s faint rings and dark moons has been enhanced for visibility. (NASA/Erich Karkoschka (Univ. Arizona))

«Read the rest of this article»

Sections: Technology | No Comments
 

NASA’s Cassini Spacecraft observes Changes of Seasons on Saturn’s moon Titan

 

Written by Preston Dyches
NASA’s Jet Propulsion Laboratory

NASA - National Aeronautics and Space AdministrationPasadena, CA – As southern winter solstice approaches in the Saturn system, NASA’s Cassini spacecraft has been revealing dramatic seasonal changes in the atmospheric temperature and composition of Saturn’s largest moon, Titan.

Winter is taking a grip on Titan’s southern hemisphere, and a strong, whirling atmospheric circulation pattern — a vortex — has developed in the upper atmosphere over the south pole. Cassini has observed that this vortex is enriched in trace gases — gases that are otherwise quite rare in Titan’s atmosphere. Cassini’s observations show a reversal in the atmosphere above Titan’s poles since the spacecraft arrived at Saturn in 2004, when similar features were seen in the northern hemisphere.

Slipping into shadow, the south polar vortex at Saturn's moon Titan still stands out against the orange and blue haze layers that are characteristic of Titan's atmosphere. (NASA/JPL-Caltech/Space Science Institute)

Slipping into shadow, the south polar vortex at Saturn’s moon Titan still stands out against the orange and blue haze layers that are characteristic of Titan’s atmosphere. (NASA/JPL-Caltech/Space Science Institute)

«Read the rest of this article»

Sections: Technology | No Comments
 

NASA’s Cassini Spacecraft observes Mystery Cloud on Saturn’s moon Titan

 

Written by Preston Dyches
NASA’s Jet Propulsion Laboratory

NASA - National Aeronautics and Space AdministrationPasadena, CA – The puzzling appearance of an ice cloud seemingly out of thin air has prompted NASA scientists to suggest that a different process than previously thought — possibly similar to one seen over Earth’s poles — could be forming clouds on Saturn’s moon Titan.

Located in Titan’s stratosphere, the cloud is made of a compound of carbon and nitrogen known as dicyanoacetylene (C4N2), an ingredient in the chemical cocktail that colors the giant moon’s hazy, brownish-orange atmosphere.

The hazy globe of Titan hangs in front of Saturn and its rings in this natural color view from NASA's Cassini spacecraft. (NASA/JPL-Caltech/Space Science Institute)

The hazy globe of Titan hangs in front of Saturn and its rings in this natural color view from NASA’s Cassini spacecraft. (NASA/JPL-Caltech/Space Science Institute)

«Read the rest of this article»

Sections: Technology | No Comments
 


NASA’s Cassini Spacecraft starts final year studying Saturn

 

Written by Preston Dyches
NASA’s Jet Propulsion Laboratory

NASA - National Aeronautics and Space AdministrationPasadena, CA – After more than 12 years studying Saturn, its rings and moons, NASA’s Cassini spacecraft has entered the final year of its epic voyage. The conclusion of the historic scientific odyssey is planned for September 2017, but not before the spacecraft completes a daring two-part endgame.

Beginning on November 30th, Cassini’s orbit will send the spacecraft just past the outer edge of the main rings. These orbits, a series of 20, are called the F-ring orbits. During these weekly orbits, Cassini will approach to within 4,850 miles (7,800 kilometers) of the center of the narrow F ring, with its peculiar kinked and braided structure.

Since NASA's Cassini spacecraft arrived at Saturn, the planet's appearance has changed greatly. This view shows Saturn's northern hemisphere in 2016, as that part of the planet nears its northern hemisphere summer solstice in May 2017. (NASA/JPL-Caltech/Space Science Institute)

Since NASA’s Cassini spacecraft arrived at Saturn, the planet’s appearance has changed greatly. This view shows Saturn’s northern hemisphere in 2016, as that part of the planet nears its northern hemisphere summer solstice in May 2017. (NASA/JPL-Caltech/Space Science Institute)

«Read the rest of this article»

Sections: Technology | No Comments
 

NASA’s Cassini spacecraft images reveals Dunes on Saturn’s moon Titan

 

Written by Preston Dyches
NASA’s Jet Propulsion Laboratory

NASA - National Aeronautics and Space AdministrationPasadena, CA – New scenes from a frigid alien landscape are coming to light in recent radar images of Saturn’s largest moon, Titan, from NASA’s Cassini spacecraft.

Cassini obtained the views during a close flyby of Titan on July 25th, when the spacecraft came as close as 607 miles (976 kilometers) from the giant moon. The spacecraft’s radar instrument is able to penetrate the dense, global haze that surrounds Titan, to reveal fine details on the surface.

This synthetic-aperture radar (SAR) image was obtained by NASA's Cassini spacecraft on July 25, 2016, during its "T-121" pass over Titan's southern latitudes. (NASA/JPL-Caltech/ASI/Université Paris-Diderot)

This synthetic-aperture radar (SAR) image was obtained by NASA’s Cassini spacecraft on July 25, 2016, during its “T-121” pass over Titan’s southern latitudes. (NASA/JPL-Caltech/ASI/Université Paris-Diderot)

«Read the rest of this article»

Sections: Technology | No Comments
 

NASA’s Cassini spacecraft discovers deep canyons on Saturn’s moon Titan filled with Hydrocarbons

 

Written by Preston Dyches
NASA’s Jet Propulsion Laboratory

NASA - National Aeronautics and Space AdministrationPasadena, CA – NASA’s Cassini spacecraft has found deep, steep-sided canyons on Saturn’s moon Titan that are flooded with liquid hydrocarbons. The finding represents the first direct evidence of the presence of liquid-filled channels on Titan, as well as the first observation of canyons hundreds of meters deep.

A new paper in the journal Geophysical Research Letters describes how scientists analyzed Cassini data from a close pass the spacecraft made over Titan in May 2013. During the flyby, Cassini’s radar instrument focused on channels that branch out from the large, northern sea Ligeia Mare.

NASA's Cassini spacecraft pinged the surface of Titan with microwaves, finding that some channels are deep, steep-sided canyons filled with liquid hydrocarbons. One such feature is Vid Flumina, the branching network of narrow lines in the upper-left quadrant of the image. (NASA/JPL-Caltech/ASI)

NASA’s Cassini spacecraft pinged the surface of Titan with microwaves, finding that some channels are deep, steep-sided canyons filled with liquid hydrocarbons. One such feature is Vid Flumina, the branching network of narrow lines in the upper-left quadrant of the image. (NASA/JPL-Caltech/ASI)

«Read the rest of this article»

Sections: Technology | No Comments
 


Page 1 of 1512345...»

  • Visit Us On FacebookVisit Us On TwitterVisit Us On GooglePlusVisit Us On PinterestVisit Us On YoutubeCheck Our Feed
  • Personal Controls

    Archives

      December 2016
      S M T W T F S
      « Nov    
       123
      45678910
      11121314151617
      18192021222324
      25262728293031