A cutdrawing of an GPHS-RTG that are used for Galileo, Ulysses, Cassini-Huygens and New Horizons space probes.
NASA
<a rel="nofollow" class="external free" href="http://solarsystem.nasa.gov/rps/rtg.cfm">http://solarsystem.nasa.gov/rps/rtg.cfm</a> <a rel="nofollow" class="external text" href="http://solarsystem.nasa.gov/rps/docs/GPHSRTGcutaway2.jpg">JPG</a>