Ny h-eaystyn Galileagh
[[File:Jupitermoon.jpg|thumb|Kiare eaystyn Galileagh [[Jupiter]] ayns jalloo covestit ta soilshaghey Jupiter as mooadyssyn conastagh ny h-eaystyn (cha nee rieugh ny h-ynnydyn oc). Voish y vaare dys y vun: [[Io (eayst)|Io]], [[Europa (eayst)|Europa]], [[Ganymede (eayst)|Ganymede]], [[Callisto (eayst)|Callisto]].]]
Ta '''ny h-eaystyn Galileagh''' ny '''ny fo-phlanaidyn Galileagh''' çheet er ny kiare [[eaystyn Jupiter|eaystyn smoo jeh Jupiter]]: [[Io (eayst)|Io]], [[Europa (eayst)|Europa]], [[Ganymede (eayst)|Ganymede]], as [[Callisto (eayst)|Callisto]]. Ren [[Galileo Galilei]] cur shilley orroo da'n chied cheayrt ayns Mee ny Nollick 1609 ny Jerrey Geuree 1610, as ren eh cur enney orroo myr fo-phlanaidyn Jupiter ayns Mayrnt 1610.<ref>Drake, Stillman (1978). Galileo At Work. Chicago: University of Chicago Press.</ref> V'ad nyn gied reddyn ve feddynit magh as va cruinlaghey planaid elley goaill magh y Chruinney.

T'ad coontit mastey [[Rolley eaystyn rere crantessen|ny corpaneyn smoo]] ayns [[Corys ny Greiney]] faagail magh y [[Yn Ghrian|Ghrian]] as ny hoght [[planaid]]yn, as craueyn raadeeoil ny smoo na fer erbee jeh ny [[planaid crivassanagh|planaidyn crivassanagh]]. She Ganymede yn eayst smoo ayns Corys ny Greiney, ny smoo na [[Curain]], ga nagh vel eh cha mooar rere glout. Ta ny tree eaystyn sthie—Io, Europa, as Ganymede—ayns [[aavuilley cruinlagh]] er 4:2:1 rish y cheilley. Ga dy vel cummey cruinn ec ny h-eaystyn Galileagh, ta cummaghyn meereiltagh ec dagh fer elley jeh eaystyn Jupiter.

Va ny h-eaystyn Galileagh fakinit da'n chied cheayrt ayns 1609 ny ayns 1610 erreish da ren Galileo lhiassaghyn rish y [[fodreayrtan]] echey. Lhig ny lhiassaghyn shen da corpaneyn nuauoilagh y chronnaghey ny share na rieau. Haishbyn baghtyn Galileo scansh y fodreayrtan myr greie da rollageyderyn er-yn-oyr dy ren eh prowal dy row reddyn 'sy spoar nagh row ry-akin ec y tooill. Ren feddyn magh corpaneyn niauoilagh va cruinlaghey red elley nagh row yn Chruinney cur builley da'n [[Kiaddey dowan-laarnagh|chorys dowanagh Ptolemaiagh]], sheiltynys dowan-laarnagh raad ta dagh red cruinlaghey yn Chruinney.

Hoshiaght, d'enmys Galileo yn feddyn magh myr y '''Cosmica Sidera''' ("rollageyn [[Cosimo II de' Medici, Ard-diuc y Tuscaan|Cosimo]]"), agh va'n rah ec ny h-enmyn va reiht ec [[Simon Marius]]. Ren Marius feddyn magh ny h-eaystyn liorish hene begnagh ec y traa cheddin ren Galileo feddyn ad magh, 8 Jerrey Geuree 1610, as hug eh nyn enmyn roie daue, as ad çheet magh as graihderyn [[Zeus]], rere faaue liorish [[Johannes Kepler]], 'sy ''Mundus Jovialis'' echey va soilshit magh ayns 1614.<ref>{{cite journal |author = Pasachoff, Jay M. |title=Simon Marius's Mundus Iovialis: 400th Anniversary in Galileo's Shadow
 |journal=Journal for the History of Astronomy|date=2015|volume=46 |issue=2|pages=218–234 |bibcode=2015AAS...22521505P |doi = 10.1177/0021828615585493
|s2cid=120470649 }}</ref>

Cha row fys er eayst elley Jupiter faagail magh ny h-eaystyn Galileagh derrey feddyn magh yn eayst [[Amalthea (eayst)|Amalthea]] ayns 1892.<ref>{{Cite web|url=https://solarsystem.nasa.gov/moons/jupiter-moons/amalthea/in-depth|title=In Depth {{!}} Amalthea|website=NASA Solar System Exploration|accessdate=2019-11-17|archivedate=2019-08-25|archiveurl=https://web.archive.org/web/20190825223006/https://solarsystem.nasa.gov/moons/jupiter-moons/amalthea/in-depth/|url-status=live}}</ref>

== Olteynyn ==
{| class="sortable wikitable"
|+
|-
! Ennym<br>
! class="unsortable" |Jalloo
! class="unsortable" |Cummey yn çheu-sthie
! Crantessen<br>(km)
! Glout<br>(kg)
! Trimmid<br>(g/cm<sup>3</sup>)
! <small>[[Essylys lieh-vooar|Essylys {{nowrap|lieh-vooar}}]]<br>(km)<ref>Er ny cho-earrooaghey liorish leagh µ yn [https://archive.today/20110520031937/https://www.minorplanetcenter.org/iau/NatSats/NaturalSatellites.html IAU-MPC Satellites Ephemeris Service]</ref></small>
! <small>[[Amm cruinlagh]] ([[Laa|laaghyn]])<ref>{{cite web|url=https://www.nasa.gov/sites/default/files/files/Moons_of_Jupiter_Lithograph.pdf |title=Moons of Jupiter |archiveurl=https://web.archive.org/web/20170608134945/https://www.nasa.gov/sites/default/files/files/Moons_of_Jupiter_Lithograph.pdf |archivedate=2017-06-08 |work=NASA}}</ref> (conastagh rish Io)</small>
! [[Cleayn]]<br>([[Keim (uillin)|°]])<ref>Er ny cho-earrooaghey voish [https://web.archive.org/web/20110807210105/https://www.hnsky.org/iau-iag.htm IAG Travaux 2001]</ref>
! <small>[[Corrid chruinlagh|Corrid]]</small>
|-
| style="text-align:center;" | '''[[Io (eayst)|Io]]''' <br>''Jupiter I''
| style="background:black; text-align:center;" |[[Coadan:Io highest resolution true color.jpg|121x121px]]
| style="background:black; text-align:center;" |[[Coadan:PIA01129 Interior of Io.jpg|121px]]
| style="text-align:center;" | 3660.0<br>× 3637.4<br>× 3630.6
| style="text-align:center;" | 8.93 × 10<sup>22</sup>
| style="text-align:center;" | 3.528
| style="text-align:center;" | 421800
| style="text-align:center;" | 1.769 <br>(1)
| style="text-align:center;" | 0.050
| style="text-align:center;" | 0.0041
|-
| style="text-align:center;" | '''[[Europa (eayst)|Europa]]''' <br>''Jupiter II''
| style="background:black; text-align:center;" |[[Coadan:Europa-moon.jpg|104px]]
| style="background:black; text-align:center;" |[[Coadan:PIA01130 Interior of Europa.jpg|104px]]
| style="text-align:center;" | 3121.6
| style="text-align:center;" | 4.8 × 10<sup>22</sup>
| style="text-align:center;" | 3.014
| style="text-align:center;" | 671100
| style="text-align:center;" | 3.551 <br>(2.0)
| style="text-align:center;" | 0.471
| style="text-align:center;" | 0.0094
|-
| style="text-align:center;" | '''[[Ganymede (eayst)|Ganymede]]''' <br>''Jupiter III''
| style="background:black; text-align:center;" |[[Coadan:Moon Ganymede by NOAA - cropped.jpg|175x175px]]
| style="background:black; text-align:center;" |[[Coadan:PIA18005-NASA-InsideGanymede-20140501a.png|175px]]
| style="text-align:center;" | 5268.2
| style="text-align:center;" | 1.48 × 10<sup>23</sup>
| style="text-align:center;" | 1.942
| style="text-align:center;" | 1070400
| style="text-align:center;" | 7.155 <br>(4.0)
| style="text-align:center;" | 0.204
| style="text-align:center;" | 0.0011
|-
| style="text-align:center;" | '''[[Callisto (eayst)|Callisto]]''' <br>''Jupiter IV''
| style="background:black; text-align:center;" |[[Coadan:Callisto (cropped).jpg|160x160px]]
| style="background:black; text-align:center;" |[[Coadan:PIA01478 Interior of Callisto.jpg|160px]]
| style="text-align:center;" | 4820.6
| style="text-align:center;" | 1.08 × 10<sup>23</sup>
| style="text-align:center;" | 1.834
| style="text-align:center;" | 1882700
| style="text-align:center;" | 16.69 <br>(9.4)
| style="text-align:center;" | 0.205
| style="text-align:center;" | 0.0074
|}

== Imraaghyn ==
{{rolleyimraaghyn}}

==Kianglaghyn magh==

{{commons category|Galilean moons|ny h-eaystyn Galileagh}}

* [https://www.skyandtelescope.com/observing/objects/javascript/3307071.html Greie lesh Sky & Telescope ry hoi cur enney er ny h-eaystyn Galileagh] {{en jalloo}}
*[https://thehappykoala.github.io/Harmony-of-the-Spheres/#/category/Solar%20System/scenario/The%20Jovian%20System Sheiltyn Eddyr-obbraghey 3D er Jupiter as ny h-eaystyn Galileagh] {{en jalloo}}
* [https://thebigbangoptics.com/jupiters-moons/ ''A Beginner's Guide to Jupiter's Moons''] {{en jalloo}}

{{DEFAULTSORT:Galilean Moons}}
[[Ronney:Eaystyn Galileagh| ]]
[[Ronney:Caghlaa Mooar Copernicagh]]
[[Ronney:Eaystyn Jupiter]]
[[Ronney:Eaystyn as cruinlee far-ghraadagh oc]]
Ta ny h-eaystyn Galileagh ny ny fo-phlanaidyn Galileagh çheet er ny kiare eaystyn smoo jeh Jupiter: Io, Europa, Ganymede, as Callisto. Ren Galileo Galilei cur shilley orroo da'n chied cheayrt ayns Mee ny Nollick 1609 ny Jerrey Geuree 1610, as ren eh cur enney orroo myr fo-phlanaidyn Jupiter ayns Mayrnt 1610.Drake, Stillman (1978). Galileo At Work. Chicago: University of Chicago Press. V'ad nyn gied reddyn ve feddynit magh as va cruinlaghey planaid elley goaill magh y Chruinney.

T'ad coontit mastey ny corpaneyn smoo ayns Corys ny Greiney faagail magh y Ghrian as ny hoght planaidyn, as craueyn raadeeoil ny smoo na fer erbee jeh ny planaidyn crivassanagh. She Ganymede yn eayst smoo ayns Corys ny Greiney, ny smoo na Curain, ga nagh vel eh cha mooar rere glout. Ta ny tree eaystyn sthie—Io, Europa, as Ganymede—ayns aavuilley cruinlagh er 4:2:1 rish y cheilley. Ga dy vel cummey cruinn ec ny h-eaystyn Galileagh, ta cummaghyn meereiltagh ec dagh fer elley jeh eaystyn Jupiter.

Va ny h-eaystyn Galileagh fakinit da'n chied cheayrt ayns 1609 ny ayns 1610 erreish da ren Galileo lhiassaghyn rish y fodreayrtan echey. Lhig ny lhiassaghyn shen da corpaneyn nuauoilagh y chronnaghey ny share na rieau. Haishbyn baghtyn Galileo scansh y fodreayrtan myr greie da rollageyderyn er-yn-oyr dy ren eh prowal dy row reddyn 'sy spoar nagh row ry-akin ec y tooill. Ren feddyn magh corpaneyn niauoilagh va cruinlaghey red elley nagh row yn Chruinney cur builley da'n chorys dowanagh Ptolemaiagh, sheiltynys dowan-laarnagh raad ta dagh red cruinlaghey yn Chruinney.

Hoshiaght, d'enmys Galileo yn feddyn magh myr y Cosmica Sidera ("rollageyn Cosimo"), agh va'n rah ec ny h-enmyn va reiht ec Simon Marius. Ren Marius feddyn magh ny h-eaystyn liorish hene begnagh ec y traa cheddin ren Galileo feddyn ad magh, 8 Jerrey Geuree 1610, as hug eh nyn enmyn roie daue, as ad çheet magh as graihderyn Zeus, rere faaue liorish Johannes Kepler, 'sy Mundus Jovialis echey va soilshit magh ayns 1614.

Cha row fys er eayst elley Jupiter faagail magh ny h-eaystyn Galileagh derrey feddyn magh yn eayst Amalthea ayns 1892.

 Olteynyn 
+ EnnymJallooCummey yn çheu-sthie Crantessen(km) Glout(kg) Trimmid(g/cm3) Essylys (km)Er ny cho-earrooaghey liorish leagh µ yn IAU-MPC Satellites Ephemeris Service Amm cruinlagh (laaghyn) (conastagh rish Io) Cleayn(°)Er ny cho-earrooaghey voish IAG Travaux 2001 Corrid Io Jupiter I121x121px121px 3660.0× 3637.4× 3630.6 8.93 × 1022 3.528 421800 1.769 (1) 0.050 0.0041 Europa Jupiter II104px104px 3121.6 4.8 × 1022 3.014 671100 3.551 (2.0) 0.471 0.0094 Ganymede Jupiter III175x175px175px 5268.2 1.48 × 1023 1.942 1070400 7.155 (4.0) 0.204 0.0011 Callisto Jupiter IV160x160px160px 4820.6 1.08 × 1023 1.834 1882700 16.69 (9.4) 0.205 0.0074

 Imraaghyn 

Kianglaghyn magh

 Greie lesh Sky & Telescope ry hoi cur enney er ny h-eaystyn Galileagh 
Sheiltyn Eddyr-obbraghey 3D er Jupiter as ny h-eaystyn Galileagh 
 A Beginner's Guide to Jupiter's Moons 

 
Ronney:Caghlaa Mooar Copernicagh
Ronney:Eaystyn Jupiter
Ronney:Eaystyn as cruinlee far-ghraadagh oc