PIA01129: Interior of Io
Cutaway view of the possible internal structure of Io. The surface of the satellite is a mosaic of images obtained in 1979 by NASA's Voyager spacecraft.
 Target Name:  Io
 Is a satellite of:  Jupiter
 Mission:  Galileo 
 Spacecraft:  Galileo Orbiter
 Instrument:  Solid-State Imaging 
 Product Size:  2666 x 2000 pixels (w x h) 
 Produced By:  JPL 
 Producer ID:  P49439 MRPS80481  
 Addition Date:  1997-12-18 
 Primary Data Set:  Galileo EDRs 
 Full-Res TIFF:  PIA01129.tif (8.285 MB)
 Full-Res JPEG:  PIA01129.jpg (579.6 kB)  

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Original Caption Released with Image:

Cutaway view of the possible internal structure of Io The surface of the satellite is a mosaic of images obtained in 1979 by NASA's Voyager spacecraft The interior characteristics are inferred from gravity field and magnetic field measurements by NASA's Galileo spacecraft. Io's radius is 1821 km, similar to the 1738 km radius of our Moon; Io has a metallic (iron, nickel) core (shown in gray) drawn to the correct relative size. The core is surrounded by a rock shell (shown in brown). Io's rock or silicate shell extends to the surface.

The Jet Propulsion Laboratory, Pasadena, CA manages the mission for NASA's Office of Space Science, Washington, DC.

This image and other images and data received from Galileo are posted on the World Wide Web, on the Galileo mission home page at URL http://www.jpl.nasa.gov/galileo/sepo.

Image Credit:
NASA/JPL

Image Addition Date:
1997-12-18