ESA : Saturno y sus anillos

http://www.esa.int/esl/ESA_in_your_country/Spain/Saturno_y_sus_anillos

Saturn and rings, 7 June 2017

SATURNO Y SUS ANILLOS

3 julio 2017

La sonda internacional Cassini ya ha completado la mitad de las 22 inmersiones previstas entre Saturno y sus anillos antes de concluir su misión el 15 de septiembre. Cassini lleva 13 años explorando el sistema saturniano y, desde el 22 de abril, su ‘Gran Final’ la está llevando a describir una serie de órbitas por territorio inexplorado.   

La imagen que hoy nos ocupa fue capturada el 7 de junio, mientras la sonda comenzaba su octava inmersión. Se trata de una fotografía sin procesar tomada con la cámara de gran angular y muestra el planeta, sus anillos y una proyección de la sombra de Saturno sobre los anillos interiores. 

Cada una de las 22 órbitas elípticas dura unos seis días y medio y, en ellas, la nave atraviesa unos 2.400 km de distancia a velocidades de entre 121.000 y 126.000 km/h. 

Además de proporcionarnos imágenes impactantes, estas inmersiones permiten recopilar datos únicos que ayudarán a los científicos a resolver algunos misterios acerca de la masa de los anillos de Saturno y la velocidad de rotación del planeta. En las últimas cinco órbitas, la sonda también se adentrará en la atmósfera superior de Saturno para tomar directamente muestras de ella. 

Una vez concluida su última órbita, Cassini sobrevolará Titán a cierta distancia, alterando definitivamente vez su trayectoria para después realizar una inmersión controlada en la atmósfera del planeta y dar así por finalizada esta increíble misión. 

Para saber más sobre la gran final, haz clic aquí. Si deseas ver las imágenes más recientes, visita la galería de imágenes no procesadas. 

Cassini-Huygens es una misión conjunta de la NASA, la ESA y la agencia espacial italiana ASI.

ESA
Guillermo Gonzalo Sánchez Achutegui
ayabaca@gmail.com
ayabaca@hotmail.com
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ESA : The longest call .- La llamada más larga hasta ahora en el espacio..........desde el planeta Saturno hasta La Tierra...

http://www.esa.int/spaceinimages/Images/2016/08/The_longest_call

El 10 de agosto de 2016, la estación de la ESA de seguimiento en New Norcia, con una antena   35 m de diámetro,  y 630 toneladas de peso,  enfocando al  espacio profundo en Australia Occidental,  recibe las señales transmitidas por el orbitador Cassini de la NASA; desde el planeta  Saturno, a través de 1,44 millones de kilómetros de espacio.

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Details

• Title The longest call
• Released 18/08/2016 10:23 am
• Copyright ESA/D. O'Donnell
• Description
  On 10 August 2016, ESA’s tracking station at New Norcia, Western Australia, hosting a 35 m-diameter, 630-tonne deep-space antenna, received signals transmitted by NASA’s Cassini orbiter at Saturn, through 1.44 billion km of space.
  “This was the farthest-ever reception for an ESA station, and the radio signals – travelling at the speed of light – took 80 minutes to cover this vast distance,” says Daniel Firre, responsible for supporting Cassini radio science at ESOC, ESA’s operations centre in Darmstadt, Germany.
  The signal reception was part of a series of tests to prepare several ESA stations to support Cassini’s radio science investigations, planned to begin later in 2016.
  This image shows New Norcia station as seen in 2014 by Dylan O’Donnell, an amateur photographer based in Byron Bay, Australia (the blob of light apparently hovering above the antenna is a light artefact, ‘lens flare’).
  More information
  New Norcia station
  Estrack ground station network
  Cassini-Huygens
• Id 364134

TAGS

• Click on the tags to find the matching images.
• Activity Operations
• Mission Cassini-Huygens
• System ESTRACK
• Location New Norcia , New Norcia , Australia
• Action Tracking

ESA
Guillermo Gonzalo Sánchez Achutegui
ayabaca@gmail.com
ayabaca@hotmail.com
ayabaca@yahoo.com
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NASA : Vortex and Rings

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Vortex and Rings

The Cassini spacecraft captures three magnificent sights at once: Saturn's north polar vortex and hexagon along with its expansive rings.
The hexagon, which is wider than two Earths, owes its appearance to the jet stream that forms its perimeter. The jet stream forms a six-lobed, stationary wave which wraps around the north polar regions at a latitude of roughly 77 degrees North.
This view looks toward the sunlit side of the rings from about 37 degrees above the ringplane. The image was taken with the Cassini spacecraft wide-angle camera on April 2, 2014 using a spectral filter which preferentially admits wavelengths of near-infrared light centered at 752 nanometers.
The view was obtained at a distance of approximately 1.4 million miles (2.2 million kilometers) from Saturn and at a Sun-Saturn-spacecraft, or phase, angle of 43 degrees. Image scale is 81 miles (131 kilometers) per pixel.
The Cassini-Huygens mission is a cooperative project of NASA, the European Space Agency and the Italian Space Agency. The Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, manages the mission for NASA's Science Mission Directorate, Washington, D.C. The Cassini orbiter and its two onboard cameras were designed, developed and assembled at JPL. The imaging operations center is based at the Space Science Institute in Boulder, Colo.
For more information about the Cassini-Huygens mission
visit http://www.nasa.gov/cassini
and
 http://saturn.jpl.nasa.gov .
The Cassini imaging team homepage is
at http://ciclops.org .
Credit: NASA/JPL-Caltech/Space Science Institute

NASA

Guillermo Gonzalo Sánchez Achutegui
ayabaca@gmail.com
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NASA : Infrared Image of Saturn's Rings

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Infrared Image of Saturn's Rings

Although it may look to our eyes like other images of the rings, this infrared image of Saturn's rings was taken with a special filter that will only admit light polarized in one direction. Scientists can use these images to learn more about the nature of the particles that make up Saturn's rings.

The bright spot in the rings is the "opposition surge" where the Sun-Ring-Spacecraft angle passes through zero degrees. Ring scientists can also use the size and magnitude of this bright spot to learn more about the surface properties of the ring particles.

This view looks toward the sunlit side of the rings from about 19 degrees above the ringplane. The image was taken with the Cassini spacecraft wide-angle camera on Aug. 18, 2013 using a spectral filter sensitive to wavelengths of near-infrared light centered at 705 nanometers.

The view was acquired at a distance of approximately 712,000 miles (1.1 million kilometers) from Saturn and at a Sun-rings-spacecraft, or phase, angle of 7 degrees. Image scale is 43 miles (68 kilometers) per pixel.

For more information about the Cassini mission, visit www.nasa.gov/cassini.

Image Credit: NASA/JPL-Caltech/Space Science Institute

NASA

Guillermo Gonzalo Sánchez Achutegui

ayabaca@gmail.com

ayabaca@hotmail.com

ayabaca@yahoo.com

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NASA : Sunlit Edge of Saturn's Largest Moon, Titan

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Sunlit Edge of Saturn's Largest Moon, Titan

The sunlit edge of Titan's south polar vortex stands out distinctly against the darkness of the moon's unilluminated hazy atmosphere. The Cassini spacecraft images of the vortex led scientists to conclude that its clouds form at a much higher altitude -- where sunlight can still reach -- than the surrounding haze.

Titan (3,200 miles, or 5,150 kilometers across) is Saturn's largest moon. This view looks toward the trailing hemisphere of Titan. North on Titan is up and rotated 32 degrees to the left. The image was taken with the Cassini spacecraft narrow-angle camera on July 14, 2013 using a spectral filter sensitive to wavelengths of near-infrared light centered at 938 nanometers.

The view was obtained at a distance of approximately 808,000 miles (1.3 million kilometers) from Titan and at a Sun-Titan-spacecraft, or phase, angle of 82 degrees. Image scale is 5 miles (8 kilometers) per pixel.

> View a color image of the south polar vortex on Titan

Image Credit: NASA/JPL-Caltech/Space Science Institute

NASA
Guillermo Gonzalo Sánchez Achutegui
ayabaca@gmail.com
ayabaca@hotmail.com
ayabaca@yahoo.com
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