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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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This image of a wall on Occator Crater on Ceres was obtained by NASA's Dawn spacecraft on July 5, 2018 from an altitude of about 26 miles (43 kilometers).
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Occator Crater Wall
Occator Crater Wall
Cassini spied a crater-covered Dione in this image from Dec. 8, 2004. The bright, wispy streaks for which Dione is known are located on the moon's night side to the west. The streaky terrain was im...
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Black and White image of heavily cratered surface of Dione.
Pocked Moon
Saturn's softly glowing rings shine in scattered sunlight.
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Saturn's rings shine in scattered sunlight
Rings Aglow
Great Dark Spot
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Great Dark Spot
Great Dark Spot
The Cassini spacecraft gazes at several albedo features on Saturn's largest moon, Titan. Left to right are four dark regions: Fensal, Aztlan, Aaru and a part of Senkyo. The bright area Quivira lie...
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Titan
Dark Quartet
This raw, unprocessed image of Prometheus [pro-MEE-thee-us], taken in visible light, was obtained by Cassini's narrow-angle camera at a distance of approximately 36,000 kilometers (23,000 miles). ...
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Prometheus
Prometheus: Over Easy
Colorful new images from the Cassini spacecraft show that Saturn's northern hemisphere has a case of the blues. In the first image, the icy moon Mimas is set against a dazzling and dramatic portra...
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Side by side images. Left: Saturn's moon Mimas. On the right is the northern hemisphere of Saturn
Cassini Spacecraft Witnesses Saturn's Blues
During its very close flyby of Enceladus on March 9, 2005, Cassini took images of parts of the icy moon from different viewing angles, allowing the construction of stereo views. These "3-D" views, ...
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Close-up view of Enceledus (3-D)
Sliced-up Craters (3-D)
The Cassini spacecraft has beamed back a new, more detailed image of smog-enshrouded Titan.
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Through the Haze
Through the Haze
+ View QuickTime Movie This movie taken by the Cassini spacecraft shows the surface and atmosphere of Saturn's moon Titan over a range of infrared wavelengths, from .8 to 5.1 microns. It was capt...
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Window to Titan's Surface
Window to Titan's Surface
Saturn's rings cut across an eerie scene that is ruled by Titan's luminous crescent and globe-encircling haze, broken by the small moon Enceladus, whose icy jets are dimly visible at its south pole...
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Saturn's ring, Titan and Enceladus
Candle in the Dark
Atmosphere and Enceladus October 28, 2004 Full-Res: PIA06508 Saturn's southern atmosphere looms before Cassini, displaying rich detai...
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Atmosphere and Enceladus
Atmosphere and Enceladus
This image from NASA's Dawn spacecraft shows a detailed view of three craters, informally nicknamed 'Snowman' by the camera's team members.
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Detailed 'Snowman' Crater
Detailed 'Snowman' Crater
The Cassini spacecraft catches a glimpse of features that reveal important clues about processes occurring in Titan's atmosphere. The north polar stratosphere exhibits a banded appearance, as fast...
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Titan
High Altitude Hints
This closeup of asteroid Vesta from NASA's Dawn spacecraft shows small scale features such as grabens (linear depressions) which run parallel to and inside the troughs.
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Equatorial Troughs and Dark Material II
Equatorial Troughs and Dark Material II
Thanks to the illumination angle, Mimas (right) and Dione (left) appear to be staring up at a giant Saturn looming in the background.
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Saturn, Mimas and Dione
Looking Up to the Giant
  Phoebe in Ultraviolet June 23, 2004   Full-Res: PIA06401   On the right, the ultraviolet image of Sat...
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Phoebe in Ultraviolet
Phoebe in Ultraviolet
Jets of icy particles burst from Saturn's moon Enceladus in this brief movie sequence of four images taken on Nov. 27, 2005. The sensational discovery of active eruptions on a third outer solar sys...
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Screenshot from the movie 'Enceladus Plume'
Enceladus Plume Movie
Viewing Saturn's rings very close to edge-on produces some puzzling effects, as these two images of the F ring demonstrate. The upper image was acquired from less than a tenth of a degree beneath ...
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Two views of Saturn's F ring
On the Edge
This movie is a condensed version of Cassini's 44-hour approach to Titan. 
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Close Encounter of a First Kind
Close Encounter of a First Kind
Dark Storms, Bright Clouds September 8, 2004 Full-Res: PIA06472 Flecks of bright cloud and several dark storms dominate Saturn's sout...
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Dark Storms, Bright Clouds
Dark Storms, Bright Clouds
The Mars Color Imager (MARCI) aboard the Mars Reconnaissance Orbiter (MRO) acquires a global view of the Red Planet and its weather patterns every day. During the week of March 5, 2018, water ice c...
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full disc of mars with clouds and dust clouds visible
Clouds and Dust Storms on Mars
Entering Saturn's Magnetosphere with a Boom July 1, 2004 Full-Res: PIA06347 This graph illustrates the series of sonic booms that...
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Entering Saturn's Magnetosphere with a Boom
Entering Saturn's Magnetosphere with a Boom
The solar system's largest moon, Ganymede, is captured here alongside the planet Jupiter in a color picture taken by NASA's Cassini spacecraft on Dec. 3, 2000.
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The solar system's largest moon, Ganymede, is captured here alongside the planet Jupiter in a color picture taken by NASA's Cassini spacecraft on Dec. 3, 2000.
Ganymede and Jupiter
A flat, calm, liquid methane-ethane lake on Titan is depicted in this artist's concept. For a high resolution image, click here. Credit: Copyright 2008 Karl Kofoed
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Artist's rendition of lakes on Titan
Methane-Ethane Lakes of Titan

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