Cassini Sends Final Close Views of Odd Moon Hyperion
Ruimte en Astronomie
Cassini Sends Final Close Views of Odd Moon Hyperion
Hier was ik op aan het wachten...
Cassini heeft foto's gestuurd (gemaakt op 31 mei), van zijn kortste nadering (34.000 km) naar een van Saturnus' vreemdste manen Hyperion.
Het is een van de meest bizarre objecten van ons zonnestelsel. Hij is bezaaid met meteor kraters, waarop "donker " materiaal op de kraterbodems te zien is. Het zou kunnen zijn dat Hyperion een restant is van een botsing, waardoor een groot object in kleine stukken uiteen is gespat.
De wetenschappers van Cassini wijten zijn sponsachtige look aan het feit dat het een ongewoon lage dichtheid heeft, voor zo'n groot object. Hyperion is poreus met weinig zwaartekracht.
Cassini zal nog een paar keer "langs vliegen" voordat hij in 2017 aan de grote finale gaat beginnen: Een duik tussen Saturnus en zijn ringen!
Artikelen en foto's hieronder:
NASA's Cassini spacecraft has returned images from its final close approach to Saturn's oddball moon Hyperion, upholding the moon's reputation as one of the most bizarre objects in the solar system. The views show Hyperion's deeply impact-scarred surface, with many craters displaying dark material on their floors.
Raw, unprocessed images from the May 31 flyby are available via the Cassini mission website at:
http://saturn.jpl.nasa.gov/photos/raw
A selection of some of the images is also available from the Cassini imaging team's website at:
http://www.ciclops.org/view_event/208/HYPERION-REV-216-RAW-PREVIEW
During this flyby, Cassini passed Hyperion at a distance of about 21,000 miles (34,000 kilometers) at closest approach. Cassini's closest-ever Hyperion flyby took place on Sept. 26, 2005, at a distance of 314 miles (505 kilometers).
Hyperion is the largest of Saturn’s irregular, or potato-shaped, moons and may be the remnant of a violent collision that shattered a larger object into pieces. Cassini scientists attribute Hyperion's peculiar, sponge-like appearance to the fact that it has an unusually low density for such a large object -- about half that of water. Its low density indicates Hyperion is quite porous, with weak surface gravity. These characteristics mean impactors tend to compress the surface, rather than excavating it, and most material that is blown off the surface never returns.
Cassini will make several more close flybys of Saturn's moons this year before departing the planet's equatorial plane to begin a year-long setup of the mission's daring final act. For its grand finale, set for 2017, Cassini will repeatedly dive through the space between Saturn and its rings.
The Cassini-Huygens mission is a cooperative project of NASA, ESA (European Space Agency) and the Italian Space Agency. NASA's Jet Propulsion Laboratory in Pasadena, California, manages the mission for the agency's Science Mission Directorate in Washington. The Cassini imaging operations center is based at the Space Science Institute in Boulder, Colorado. The California Institute of Technology in Pasadena manages JPL for NASA.
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June 2, 2015
Farewell to Hyperion
NASA's Cassini imaging scientists processed this view of Saturn's moon Hyperion, taken during a close flyby on May 31, 2015. This flyby marks the mission's final close approach to Saturn's largest irregularly shaped moon.
North on Hyperion is up and rotated 37 degrees to the right. The image was taken with the Cassini spacecraft narrow-angle camera on May 31, 2015 using a spectral filter which preferentially admits wavelengths of near-infrared light centered at 862 nanometers.
The view was acquired at a distance of approximately 37,000 miles (60,000 kilometers) from Hyperion and at a Sun-Hyperion-spacecraft, or phase, angle of 20 degrees. Image scale is 1180 feet (360 meters) per pixel.
Image credit: NASA/JPL-Caltech/Space Science Institute
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Spongy Surface
NASA's Cassini imaging scientists processed this view of Saturn's moon Hyperion, taken during a close flyby on May 31, 2015. This flyby marks the mission's final close approach to Saturn's largest irregularly shaped moon.
North on Hyperion is up and rotated 55 degrees to the left. The image was taken in visible light with the Cassini spacecraft narrow-angle camera on May 31, 2015.
The view was acquired at a distance of approximately 24,000 miles (38,000 kilometers) from Hyperion and at a Sun-Hyperion-spacecraft, or phase, angle of 46 degrees. Image scale is 145 feet (230 meters) per pixel.
Last Updated: June 3, 2015
Editor: Tony Greicius
Meer foto's van Hyperion: http://saturn.jpl.nasa.gov/photos/index.cfm?subCategory=29
Bron:
http://www.nasa.gov/jpl/cassini-sends-final-close-views-of-odd-moon-hyperion
http://www.nasa.gov/jpl/cassini/pia17193/farewell-to-hyperion
http://www.nasa.gov/jpl/cassini/pia17194/spongy-surface
Cassini heeft foto's gestuurd (gemaakt op 31 mei), van zijn kortste nadering (34.000 km) naar een van Saturnus' vreemdste manen Hyperion.
Het is een van de meest bizarre objecten van ons zonnestelsel. Hij is bezaaid met meteor kraters, waarop "donker " materiaal op de kraterbodems te zien is. Het zou kunnen zijn dat Hyperion een restant is van een botsing, waardoor een groot object in kleine stukken uiteen is gespat.
De wetenschappers van Cassini wijten zijn sponsachtige look aan het feit dat het een ongewoon lage dichtheid heeft, voor zo'n groot object. Hyperion is poreus met weinig zwaartekracht.
Cassini zal nog een paar keer "langs vliegen" voordat hij in 2017 aan de grote finale gaat beginnen: Een duik tussen Saturnus en zijn ringen!
Artikelen en foto's hieronder:
Cassini Sends Final Close Views of Odd Moon Hyperion
NASA's Cassini spacecraft has returned images from its final close approach to Saturn's oddball moon Hyperion, upholding the moon's reputation as one of the most bizarre objects in the solar system. The views show Hyperion's deeply impact-scarred surface, with many craters displaying dark material on their floors.Raw, unprocessed images from the May 31 flyby are available via the Cassini mission website at:
http://saturn.jpl.nasa.gov/photos/raw
A selection of some of the images is also available from the Cassini imaging team's website at:
http://www.ciclops.org/view_event/208/HYPERION-REV-216-RAW-PREVIEW
During this flyby, Cassini passed Hyperion at a distance of about 21,000 miles (34,000 kilometers) at closest approach. Cassini's closest-ever Hyperion flyby took place on Sept. 26, 2005, at a distance of 314 miles (505 kilometers).
Hyperion is the largest of Saturn’s irregular, or potato-shaped, moons and may be the remnant of a violent collision that shattered a larger object into pieces. Cassini scientists attribute Hyperion's peculiar, sponge-like appearance to the fact that it has an unusually low density for such a large object -- about half that of water. Its low density indicates Hyperion is quite porous, with weak surface gravity. These characteristics mean impactors tend to compress the surface, rather than excavating it, and most material that is blown off the surface never returns.
Cassini will make several more close flybys of Saturn's moons this year before departing the planet's equatorial plane to begin a year-long setup of the mission's daring final act. For its grand finale, set for 2017, Cassini will repeatedly dive through the space between Saturn and its rings.
The Cassini-Huygens mission is a cooperative project of NASA, ESA (European Space Agency) and the Italian Space Agency. NASA's Jet Propulsion Laboratory in Pasadena, California, manages the mission for the agency's Science Mission Directorate in Washington. The Cassini imaging operations center is based at the Space Science Institute in Boulder, Colorado. The California Institute of Technology in Pasadena manages JPL for NASA.
------------------------------------------------------------------
June 2, 2015
Farewell to Hyperion
NASA's Cassini imaging scientists processed this view of Saturn's moon Hyperion, taken during a close flyby on May 31, 2015. This flyby marks the mission's final close approach to Saturn's largest irregularly shaped moon.
North on Hyperion is up and rotated 37 degrees to the right. The image was taken with the Cassini spacecraft narrow-angle camera on May 31, 2015 using a spectral filter which preferentially admits wavelengths of near-infrared light centered at 862 nanometers.
The view was acquired at a distance of approximately 37,000 miles (60,000 kilometers) from Hyperion and at a Sun-Hyperion-spacecraft, or phase, angle of 20 degrees. Image scale is 1180 feet (360 meters) per pixel.
Image credit: NASA/JPL-Caltech/Space Science Institute
---------------------------------------
Spongy Surface
NASA's Cassini imaging scientists processed this view of Saturn's moon Hyperion, taken during a close flyby on May 31, 2015. This flyby marks the mission's final close approach to Saturn's largest irregularly shaped moon.
North on Hyperion is up and rotated 55 degrees to the left. The image was taken in visible light with the Cassini spacecraft narrow-angle camera on May 31, 2015.
The view was acquired at a distance of approximately 24,000 miles (38,000 kilometers) from Hyperion and at a Sun-Hyperion-spacecraft, or phase, angle of 46 degrees. Image scale is 145 feet (230 meters) per pixel.
Last Updated: June 3, 2015
Editor: Tony Greicius
Meer foto's van Hyperion: http://saturn.jpl.nasa.gov/photos/index.cfm?subCategory=29
Bron:
http://www.nasa.gov/jpl/cassini-sends-final-close-views-of-odd-moon-hyperion
http://www.nasa.gov/jpl/cassini/pia17193/farewell-to-hyperion
http://www.nasa.gov/jpl/cassini/pia17194/spongy-surface
