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+ Beeld & Commons
| alt_names = Jupiter III
| adjectives =
| image = [[Lêer:Ganymede g1 true 2.jpg|250px240px|Ganymedes]]
| caption = Ganymedes, soos waargeneem deur die Galileo-wenteltuig op 26 Junie 1996.
| bgcolour = #a0ffa0
| discovery = yes
| discoverer = [[Galileo Galilei]]
| discovered = [[7 Januarie]] [[1610]]<ref name="SidereusNuncius">{{cite web |last=Galilei |first=Galileo |url=http://hsci.cas.ou.edu/images/barker/5990/Sidereus-Nuncius-whole.pdf |month=MarchMaart |year=1610 |title=Sidereus Nuncius |coauthors=translated by Edward Carlos and edited by Peter Barker |format=PDF |publisher=University of Oklahoma History of Science |accessdate=2010-01-13}}</ref><ref name="Wright">{{cite web |last=Wright |first=Ernie |url=http://home.comcast.net/~erniew/astro/sidnunj1.html |title=Galileo's First Observations of Jupiter |format=PDF |publisher=University of Oklahoma History of Science |accessdate=2010-01-13}}</ref><ref name="NASA">{{cite web|url=http://solarsystem.nasa.gov/planets/profile.cfm?Object=Jup_Ganymede |title=NASA: Ganymede |publisher=Solarsystem.nasa.gov |date=2009-09-29 |accessdate=2010-03-08}}</ref>
| semimajor = 1,&nbsp;070,&nbsp;400&nbsp;km<ref name=orbit>{{cite web|title=Planetary Satellite Mean Orbital Parameters|publisher=Jet Propulsion Laboratory, California Institute of Technology|url=http://ssd.jpl.nasa.gov/?sat_elem}}</ref>
| eccentricity = 0.,0013<ref name=orbit/>
| periapsis = 1,&nbsp;069,&nbsp;200&nbsp;km{{Ref_label|B|b|none}}
| apoapsis = 1,&nbsp;071,&nbsp;600&nbsp;km{{Ref_label|A|a|none}}
| period = 7.,15455296&nbsp;dae<ref name=orbit/>
| avg_speed = 10.,880&nbsp;km/s
| inclination = 0.,20° (tot Jupiter se [[ewenaar]])<ref name=orbit/>
| satellite_of = [[Jupiter (planeet)|Jupiter]]
| physical_characteristics = yes
| mean_radius = {{nowrap|2634.,1 ± 0.,3 km}}<br />(0.,413 Aardes[[Aarde]]s)<ref name=Showman1999>{{cite journal|last=Showman |first=Adam P.|coauthors=Malhotra, Renu|title=The Galilean Satellites|year=1999|journal=Science|volume=286|pages=77&ndash;84|doi=10.1126/science.286.5437.77| url=http://www.lpl.arizona.edu/~showman/publications/showman-malhotra-1999.pdf|format=PDF|pmid=10506564|issue=5437}}</ref>
| surface_area = 87.,0 miljoen&nbsp;km<sup>2</sup><br />(0.,171 Aardes){{Ref_label|C|c|none}}
| volume = 7.,6<sup>10</sup>&nbsp;km<sup>3</sup><br />(0.,0704 Aardes){{Ref_label|D|d|none}}
| mass = {{nowrap|1.,4819<sup>23</sup> kg}}<br />(0.,025 Aardes)<ref name=Showman1999/>
| density = 1.,936&nbsp;g/cm<sup>3</sup><ref name=Showman1999/>
| surface_grav = 1.,428&nbsp;m/s<sup>2</sup> (0.,146 ''g''){{Ref_label|E|e|none}}
| escape_velocity = 2.,741&nbsp;km/s{{Ref_label|F|f|none}}
| rotation = synchroniessinchronies
| axial_tilt = 0&ndash;0.,33°<ref name=Bills2005>{{cite journal|last=Bills|first=Bruce G.|title=Free and forced obliquities of the Galilean satellites of Jupiter|year=2005|volume=175|issue=1|pages=233&ndash;247| doi=10.1016/j.icarus.2004.10.028|bibcode=2005Icar..175..233B | journal = Icarus}}</ref>
| albedo = {{nowrap|0.,43 ± 0.,02}}<ref name=jplfact>{{cite web|last=Yeomans|first=Donald K.|date=2006-07-13|title=Planetary Satellite Physical Parameters|publisher=JPL Solar System Dynamics|url=http://ssd.jpl.nasa.gov/?sat_phys_par|accessdate=2007-11-05}}</ref>
| magnitude = 4.,61 ([[Opposisie (astronomie)|opposisie]])<ref name=jplfact/><br />4.,38 (in 1951)<ref name=horizons>{{cite web
|title=Horizon Online Ephemeris System for Ganymede (Major Body 503)
|publisher=California Institute of Technology, Jet Propulsion Laboratory
|author=Yeomans and Chamberlin
|url=http://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=mb&sstr=503
|accessdate=2010-04-14}} (4.,38 onop 3 Oktober 1951-Oct-03)</ref>
| temperatures =yes
| temp_name1 = K
| atmosphere_composition = [[Suurstof]] (100 %)<ref name=Hall1998>{{cite journal|last=Hall|first=D.T.|title=The Far-Ultraviolet Oxygen Airglow of Europa and Ganymede|journal=The Astrophysical Journal|year=1998|volume=499|issue=1|pages=475&ndash;481| doi=10.1086/305604| bibcode=1998ApJ...499..475H|author2=Feldman, P.D.|last3=McGrath|first3=M.A.|display-authors=2|last4=Strobel|first4=D. F.}}</ref>
}}
 
[[Lêer:Galilean moon Laplace resonance animation.gif|thumb|left|200px|Die orbitale resonansies van Ganymedes, Europa en Io.]]
 
'''Ganymedes''' (gan'-ə-meed-əs; [[Grieks]] ''Γανυμήδης'', ook '''Jupiter III''') is die grootste [[maan]] van die [[planeet]] [[Jupiter (planeet)|Jupiter]], en ook die grootste maan in die [[sonnestelsel]]. Ganymedes is groter as die planeet [[Mercurius]], maar sy massa is net 50% van dié van Mercurius. Ganymedes is die enigste maan wat sonder 'n teleskoop sigbaar is, maar net in baie goeie en donker situasies.
 
Dis moontlik dat Ganymedes in 364 v.C. ontdek is deur die [[Sjina|Sjinese]] sterrekundige [[Gan De]]. [[Galileo Galilei]] kry egter gewoonlik die eer daarvoor; die sterrekundige het die maan se bestaan inop [[7 Januarie]] [[1610]] geregistreer, saam met die drie ander Galileïse mane [[Europa (maan)|Europa]], [[Io (maan)|Io]] en [[Callisto (maan)|Callisto]]. Ganymedes is die enigste maan van Jupiter wat 'n manlike naam het.
 
== Verwysings ==
{{CommonsKategorie|Ganymede (moon)}}
{{Verwysings}}