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First Person -- Dr. Kevin Grazier

Kevin Grazier
Published: March 28, 2005

Get an inside view of NASA's Cassini mission to Saturn with JPL's Dr. Kevin Grazier, who also discusses his career covering science fact and fiction.

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High in the Titan Atmosphere October 25, 2004 Full-Res: PIA06120 High-altitude haze and perhaps cloud layers are visible in t...
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High in the Titan Atmosphere
High in the Titan Atmosphere
This global color mosaic of Saturn's moon Iapetus was produced from images taken by NASA's Cassini spacecraft during its first 10 years exploring the Saturn system.
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Map of Iapetus
Color Maps of Iapetus (2014)
Bright icy fractures, or linea, cover the trailing hemisphere of Saturn's moon, Dione. The Cassini spacecraft imaged the fractured terrain at high resolution in October 2005 (See At Carthage Line...
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Dione
Dionean Linea
Cassini coasts beneath giant Saturn, staring upward at its gleaming crescent and icy rings. A great bull's-eye pattern is centered on the south pole, where a vast, hurricane-like storm spins. Thi...
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Saturn
Magnificent Vista
Bright, circular cloud features waltz through the turbid atmosphere of Saturn in this Cassini spacecraft view. Several jets/bands appear in this image (center and upper right). In contrast to the...
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Saturn's atmosphere
Cloud Phantoms
These images from NASA's Dawn spacecraft are located in asteroid Vesta's Numisia quadrangle, southern hemisphere; layers can be seen slumping towards the crater's center and there is slightly brigh...
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HAMO and LAMO Images of Cornelia Crater
HAMO and LAMO Images of Cornelia Crater
Saturn's odd but ever-intriguing F ring displays multiple lanes and several bright clumps. The Keeler and Encke gaps are visible in the outer A ring, at right. This view looks toward the unillumin...
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Saturn's F ring
Odd Ring Out
This global color mosaic of Saturn's moon Enceladus was produced from images taken by NASA's Cassini spacecraft during its first 10 years exploring the Saturn system.
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Map of Enceladus
Color Map of Enceladus (2014)
This image was obtained by NASA's Dawn spacecraft on May 30, 2018 from an altitude of about 465 miles (750 kilometers).
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Complex Crater Assemblage on Ceres
Complex Crater Assemblage on Ceres
Twirling vortices swim through a vast ocean of hydrogen and helium in Saturn's far north. This view looks toward a region at 70 degrees north latitude. The image was taken with the Cassini spacec...
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Saturn's atmosphere
Paisley Skies
With its excess warmth, water ice jets and huge vapor plume laced with simple organic materials, Enceladus is an important part of the quest to understand environments compatible with the chemistry...
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Enceladus
Icy Oasis
Befitting moons named for brothers, the moons Prometheus and Epimetheus share a lot in common.
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Epimetheus, Prometheus, Saturn and its rings
A Forethought and an Afterthought
These are two raw, or unprocessed, images taken by the Cassini spacecraft during its close flyby of Saturn's moon Iapetus on September 10. For more information about the Cassini-Huygens mission vis...
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Two raw images of Iapetus
Iapetus - yin and yang
This Cassini image features a density wave in Saturn's A ring (at left) that lies around 134,500 km from Saturn. 
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Black and white close up image of Saturn's rings.
Moon Waves and Moon Wakes
This view from NASA's Dawn spacecraft shows two medium-sized craters at high northern latitudes on Ceres.
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Dawn LAMO Image 86
Dawn LAMO Image 86
This photo was taken around the time of the Mariner 4 launch to Mars, which launched on 28 November 1964. 
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This photo was taken around the time of the Mariner 4 launch to Mars, which launched on 28 November 1964.
Working Long Hours on Mariner 4
The F ring dissolves into a fuzzy stream of particles -- rather different from its usual appearance of a narrow, bright core flanked by dimmer ringlets. Also notable here is the bright clump of mat...
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F ring
Unfocused F Ring
This image, taken by NASA's Dawn spacecraft, shows the surface of dwarf planet Ceres from an altitude of 915 miles (1,470 kilometers). The image, with a resolution of 450 feet (140 meters) per pixe...
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Dawn HAMO Image 21
Dawn HAMO Image 21
Saturn's moon Enceladus reflects sunlight brightly while the planet and its rings fill the background of this Cassini view.
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Saturn's moon Enceladus reflects sunlight brightly while the planet and its rings fill the background of this Cassini view.
Bright Enceladus
Hiding within the Encke gap is the small moon Pan, partly in shadow and party cut off by the outer A ring in this view. Similar to Atlas, Pan appears to have a slight ridge around its middle; and l...
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Saturn's moon Pan, partly in shadow and party cut off by the outer A ring
Down Under on Pan
The bright crescent of Saturn's moon Dione skims along just above Saturn's ringplane as storms churn in the planet's atmosphere below. Dione is 1,118 kilometers (695 miles) across. The spectral f...
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Dione just above Saturn's ringplane
Soft Storms
Although this image is centered on the Saturn-facing hemisphere of Titan, here the sun illuminates mainly the trailing hemisphere of Saturn's largest moon. The image was taken with the Cassini sp...
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The sun illuminates mainly the trailing hemisphere of Saturn's largest moon, Titan.
Saturn's View of Titan's Trailing Hemisphere
Seven images capture the 2015 supermoon lunar eclipse. 
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Seven images showing the shadow of Earth progressively covering more of the Moon until it is just a sliver in the sky.
Supermoon Lunar Eclipse Sequence (2015)
This flyby will provide important information about Titan's upper atmosphere while the moon is in a sparsely sampled region of Saturn's magnetosphere.
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Artist's rendition of Titan flyby T-113
Titan T-113: Sampling Titan's Atmospheric Outflow
This color-enhanced image of Jupiter and two of its largest moons—Io and Europa—was captured by NASA's Juno spacecraft as it performed its eighth flyby of the gas giant planet.
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Juno Observes Jupiter, Io and Europa
Juno Observes Jupiter, Io and Europa

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