Editing Voyager 2 (section)

=== Encounter with Jupiter ===
{{Further|Exploration of Jupiter}}
[[File:Animation of Voyager 2's trajectory around Jupiter.gif|thumb|Animation of ''Voyager 2''{{'}}s trajectory around Jupiter<br />{{legend2| Magenta |''Voyager 2''}}{{·}}{{legend2| RoyalBlue |Jupiter}}{{·}}{{legend2|Lime|Io}}{{·}}{{legend2|Cyan|Europa}}{{·}}{{legend2|Gold|Ganymede}}{{·}}{{legend2|OrangeRed|Callisto}}]]
[[File:Voyager-2 Jupiter-flyby July-10-1979.png|thumb|The trajectory of ''Voyager 2'' through the Jovian system]]
''Voyager 2''{{'}}s closest approach to Jupiter occurred at 22:29 UT on July 9, 1979.<ref name="national aeronautics and space administration" /> It came within {{convert|570,000|km|mi|abbr=on}} of the planet's cloud tops.<ref>{{cite web |url=https://www.jpl.nasa.gov/history/70s/Voyager2_1979.htm |title=History |website=www.jpl.nasa.gov |access-date=October 5, 2018 |archive-date=April 16, 2022 |archive-url=https://web.archive.org/web/20220416064548/https://www.jpl.nasa.gov/history/70s/Voyager2_1979.htm |url-status=dead }}</ref>
Jupiter's [[Great Red Spot]] was revealed as a complex storm moving in a counterclockwise direction. Other smaller storms and eddies were found throughout the banded clouds.<ref name="pdsseti">{{Cite web |title=Voyager Mission Description |url=https://pds-rings.seti.org/voyager/mission/#v2_jupiterencounter |access-date=2024-06-22 |website=pdsseti |archive-date=October 7, 2018 |archive-url=https://web.archive.org/web/20181007014859/https://pds-rings.seti.org/voyager/mission/#v2_jupiterencounter |url-status=live }}</ref>

''Voyager 2'' returned images of Jupiter, as well as its moons [[Amalthea (moon)|Amalthea]], [[Io (moon)|Io]], [[Callisto (moon)|Callisto]], [[Ganymede (moon)|Ganymede]], and [[Europa (moon)|Europa]].<ref name="national aeronautics and space administration" /> During a 10-hour "volcano watch", it confirmed ''Voyager 1''{{'}}s observations of active [[Volcanism on Io|volcanism on the moon Io]], and revealed how the moon's surface had changed in the four months since the previous visit.<ref name="national aeronautics and space administration"/> Together, the Voyagers observed the eruption of nine volcanoes on Io, and there is evidence that other eruptions occurred between the two Voyager fly-bys.<ref name="nasajpl"/>

Jupiter's moon [[Europa (moon)|Europa]] displayed a large number of intersecting linear features in the low-resolution photos from ''Voyager 1''. At first, scientists believed the features might be deep cracks, caused by crustal rifting or tectonic processes. Closer high-resolution photos from ''Voyager 2'', however, were puzzling: the features lacked topographic relief, and one scientist said they "might have been painted on with a felt marker".<ref name="nasajpl" /> Europa is internally active due to tidal heating at a level about one-tenth that of Io. Europa is thought to have a thin crust (less than {{convert|30|km|mi|abbr=on}} thick) of water ice, possibly floating on a {{Convert|50|km|mi|abbr=unit|adj=on}}-deep ocean.<ref name="nasajpl"/><ref name="fastfacts"/>

Two new, small satellites, [[Adrastea (moon)|Adrastea]] and [[Metis (moon)|Metis]], were found orbiting just outside the ring.<ref name="nasajpl" /> A third new satellite, [[Thebe (moon)|Thebe]], was discovered between the orbits of Amalthea and Io.<ref name="nasajpl" />

{{Gallery| align = center
| style="width:175px;"|File:Jupiter - Region from the Great Red Spot to the South Pole.jpg|alt1=The Great Red Spot photographed during the Voyager 2 flyby of Jupiter | The [[Great Red Spot]] photographed during the ''Voyager 2'' flyby of [[Jupiter]]
|File:Voyager 2 Jupiter Io.jpg|alt2=A transit of Io across Jupiter, July 9, 1979 | A transit of [[Io (moon)|Io]] across [[Jupiter]], July 9, 1979
|File:Io - July 10 1979 (34593324401).jpg|alt3=Several faint volcanic eruptions on Io, photographed by Voyager 2 | Several faint [[volcano|volcanic]] eruptions on [[Io (moon)|Io]], photographed by ''Voyager 2''
|File:Crescent Europa - GPN-2000-000469.jpg|alt4=A color mosaic of Europa | A color mosaic of [[Europa (moon)|Europa]]
}}