Editing Pioneer 11 (section)

===Encounter with Jupiter===
{{main|Exploration of Jupiter}}
''Pioneer 11'' flew past Jupiter in November and December 1974. During its closest approach, on December 2, it passed {{cvt|42828|km|mi}} above the cloud tops. The probe obtained detailed images of the [[Great Red Spot]], transmitted the first images of the immense polar regions, and determined the mass of Jupiter's moon [[Callisto (moon)|Callisto]]. Using the gravitational pull of Jupiter, a [[gravity assist]] was used to alter the trajectory of the probe towards Saturn and gain velocity. On April 16, 1975, following the Jupiter encounter, the micrometeoroid detector was turned off.{{r|nasa1}}

<gallery class="center">
File:P11C06.jpg|alt=Pioneer 11 Jupiter encounter |''Pioneer 11'' Jupiter encounter
File:Pioneer f12.gif|alt=Approach on Jupiter |Approach on Jupiter
File:Pioneer f18.gif|alt=The Great Red Spot imaged by Pioneer 11 |The [[Great Red Spot]] imaged by ''Pioneer 11''
File:P11C03.jpg|alt=The Great Red Spot prior to closest approach |The Great Red Spot prior to closest approach
File:Pioneer f08.gif|alt=Cloud bands along the edge of Jupiter |Cloud bands along the edge of Jupiter
File:Pioneer f15.gif|alt=Beginning polar gravity assist |Beginning polar [[gravity assist]]
File:Pioneer 11 - Jupiter - p176.jpg|alt=Jupiter polar region from 1,079,000 km |[[Jupiter]] polar region from 1,079,000&nbsp;km
File:Pioneer11 Io.gif|alt=Io imaged from 756,000 km |[[Io (moon)|Io]] imaged from 756,000&nbsp;km
</gallery>
{{center|{{commons-inline|bullet=none|Category:Photos of Jupiter by Pioneer 11|''Pioneer 11'' Jupiter encounter}}}}