The Largest Moons
Moon Length of Year = Earth Length of Day = 27 days
Temperature = 266 to -292 degrees Fahrenheit
No atmosphere Water? = hopefully
Composition = heavy elements
Distance From Earth = 238,900 miles Earth Mass = .0123 Diameter = .272 Tilt = 6.68
Callisto Length of Year = Jupiter Length of Day = 16.69 days
No atmosphere Water = frozen, possibly liquid
Temperature = -205 degrees Fahrenheit
Composition = ice/rock core, ice crust, and possible liquid water layer
Distance From Jupiter = 1,170,096 miles Earth Mass = .01807 Diameter = .376 Tilt = .281
Ganymede Length of Year = Jupiter Length of Day = 7.15 days
Atmosphere = slight ozone layer Water = frozen and liquid
Temperature = -171 degrees Fahrenheit
Composition = ice/rock core, ice crust, and liquid water layer
Distance From Jupiter = 664,898 miles Earth Mass = .0247 Diameter = .413 Tilt = .195
Europa Length of Year = Jupiter Length of Day = 3.55 days
Atmosphere = slight oxygen Water = frozen and liquid
Temperature = -230 degrees Fahrenheit
Composition = ice/rock core, ice crust, and liquid water layer
Distance From Jupiter = 416,897 miles Earth Mass = .00803 Diameter = .246 Tilt = .470
Io Length of Year = Jupiter Length of Day = 1.77 days
No atmosphere (sulfur) Water = None
Temperature = -143 degrees Fahrenheit
Composition = heavy elements
Distance From Jupiter = 261,982 miles Earth Mass = .0149 Diameter = .285 Tilt = .040
Titan Length of Year = Saturn Length of Day = 15.95 days
Atmosphere = Nitrogen & Methane Water = solid, possibly liquid (Ethane rivers and lakes?)
Temperature = -291 degrees Fahrenheit
Composition = heavy elements, ice
Distance From Saturn = 759,258 miles Earth Mass = .0226 Diameter = .4037 Tilt = .33
Triton Length of Year = Neptune Length of Day = 5.87 days
Atmosphere = Nitrogen & Methane Water = frozen
Temperature = -391 degrees Fahrenheit
Composition = heavy elements, water, Nitrogen frost, methane, carbon dioxide, & carbon monoxide
Distance From Neptune = 220,473 miles Earth Mass = .00358 Diameter = .212 Tilt = 157.35