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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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Our solar system features eight planets, seen in this artist's diagram.
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Our solar system features eight planets, seen in this artist's diagram.
Our Solar System
The Encke Gap, the broad, vertical dark band running down the center of this image, is maintained by the small moon Pan (not pictured). Pan also shepherds three ringlets, all of which appear here a...
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Saturn's rings and the Encke Gap
Not-Quite-Empty Gap
These images from NASA's Dawn spacecraft are located in asteroid Vesta's Urbinia quadrangle, in Vesta's southern hemisphere.
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Apparent Brightness and Topography Images of Justina Crater
Apparent Brightness and Topography Images of Justina Crater
Rhea emerges after being occulted by the larger moon Titan. Mutual event observations such as this one, in which one moon passes close to or in front of another, help scientists refine their under...
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Rhea emerges after being occulted by the larger moon Titan
Reappearing Rhea
+ View High Res Team members of NASA's Cassini mission to Saturn gather in October 2010 at the Jet Propulsion Laboratory, Pasadena, Calif., where the mission is managed. Over 200 scientists, eng...
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Cassini team members
Cassini Team (October 2010)
The Veils of Titan May 06, 2004 Full-Res: PIA05390 The veils of Saturn's most mysterious moon have begun to lift in Cassini's eag...
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The Veils of Titan
The Veils of Titan
This image, taken by NASA's Dawn spacecraft, shows dwarf planet Ceres from an altitude of 2,700 miles (4,400 kilometers). The image, with a resolution of 1,400 feet (410 meters) per pixel, was take...
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Dawn Survey Orbit Image 28
Dawn Survey Orbit Image 28
Is Dione (698 miles or 1123 kilometers across) suddenly larger than Rhea (949 miles or 1527 kilometers across)?
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Dione and Rhea
Dione Dwarfing Rhea
The slim crescent of Ceres smiles back as the dwarf planet awaits the arrival of an emissary from Earth. This image was taken by NASA's Dawn spacecraft on March 1, 2015, just a few days before it a...
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Ceres at Dawn - Take One
Ceres at Dawn - Take One
This anaglyph made from images captured by NASA’s Cassini spacecraft shows a dramatic, 3-D view of one of the deep fractures nicknamed "tiger stripes" on Saturn’s moon Enceladus. The fractures, whi...
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This anaglyph made from images captured by NASA’s Cassini spacecraft shows a dramatic, 3-D view of one of the deep fractures nicknamed "tiger stripes" on Saturn’s moon Enceladus.
Baghdad Sulcus in 3-D
This set of images shows the areas mapped so far on Saturn's moon Titan by the Cassini radar mapper using its synthetic aperture radar imaging mode. Labels represent the approximate central longitu...
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Three images: radar swaths superimposed on a false-color image made from observations by NASA's Hubble Space Telescope.
Titan Viewed by Cassini's Radar
+ Annotated Version This image from NASA's Cassini spacecraft shows an ancient southern sea that used to sprawl out near the south pole of Saturn's moon Titan. In an annotated version, the red out...
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This image from NASA's Cassini spacecraft shows an ancient southern sea that used to sprawl out near the south pole of Saturn's moon Titan.
Outline of an Ancient Sea on Titan -- Unannotated
This artist's impression by the European Space Agency shows NASA's Cassini spacecraft exploring the magnetic environment of Saturn. The image is not to scale. Saturn's magnetosphere is depicted in ...
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This artist's impression shows Cassini exploring the magnetic environment of Saturn.
Cassini at Saturn's Bow Shock
The Cassini spacecraft peers at the pitted surface of the small and irregularly-shaped moon Hyperion. See Chiseled Away to learn how these pits are created on low-density Hyperion (270 kilometers,...
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The irregularly-shaped moon Hyperion
Pitted Hyperion
This perspective view of Damascus Sulcus was generated using high resolution images of Enceladus acquired in August 2008 at 12 to 30 meters (40 to 100 feet) resolution, together with a new topograp...
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Perspective view of Damascus Sulcus
Perspective View of Damascus Sulcus, Enceladus
Io is the most volcanically active body in the solar system. At 2,263 miles in diameter, it is slightly larger than Earth’s moon.
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Io is the most volcanically active body in the solar system. At 2,263 miles in diameter, it is slightly larger than Earth’s moon.
Io Erupts
The F ring shepherd Pandora is captured here along with other well-known examples of how Saturn’s moons shape the rings. 
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Pandora and Saturn's rings
Shepherd and Flock
This mosaic, created from images taken by NASA's Cassini spacecraft during its closest flyby of Saturn's moon Mimas, looks straight at the moon's huge Herschel Crater and reveals new insights about...
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Mimas
Examining Herschel Crater
NASA's Cassini spacecraft captures a composite near-true-color view of the huge storm churning through the atmosphere in Saturn's northern hemisphere. This storm is the largest and most intense ob...
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A near-true-color view of the huge storm churning through the atmosphere in Saturn's northern hemisphere
Spotting Saturn's Northern Storm
With its dazzling rings, Saturn radiates a beauty and splendor like no other known world. Here, Cassini has captured the cool crescent of Saturn from above the ringplane, with the planet's shadow c...
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Saturn from above the ringplane
Shadowlands
Cassini imaging scientists have waited years for the sun to reveal the hexagonal wave pattern in the clouds of Saturn's north pole, part of which can be seen at the top of this image from the Cassi...
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Saturn's north pole
Slow Northern Reveal
Radio signals sent by NASA's Cassini spacecraft to Earth through Saturn's rings revealed the presence of highly unusual regular formations of densely grouped ring particles. The harmonic ring struc...
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Artist's representation of radio signals passing from the Cassini spacecraft, through Saturn's rings, and onto a satellite dish on earth.
Saturn's Ring Rhythm
+ View Full Res This raw, unprocessed image of Saturn's moon Enceladus was taken on Oct. 19, 2011. As the spacecraft passed Enceladus, its infrared instruments, cameras and other instruments moni...
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Enceladus
Enceladus Flyby E-15 (Raw Image #9)
NASA's Cassini spacecraft has spotted a glowing patch of ultraviolet light near Saturn's north pole that marks the presence of an electrical circuit that connects Saturn with its moon Enceladus. 
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Two images of Saturn obtained by Cassini's UVIS separated by 80 minutes
Enceladus 'Footprint' on Saturn
Saturn's main rings, along with its moons, are much brighter than most stars. As a result, much shorter exposure times (10 milliseconds, in this case) are required to produce an image and not satur...
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Saturn's magnificent rings, Dione and Epimetheus
Not Really Starless at Saturn

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