Bold textSummer's ProjectNe-Ne 04:39, 26 August 2007 (UTC)

For most planets, there's 1 interesting moon. Jupiter has 4. You have to cover all of them, but your life-form only has to live on one of them (if you decide that that's how it works). Wherever they live, they would likely know about the others, and their presence would affect their mythology. Be sure to look up and understand the significance of "synchronized orbits". It would be VERY important to your lifeforms.

Leesonma 00:01, 14 September 2007 (UTC)


-Basic facts

-The 4 moons plus others

-Description of the moon's mass, distace from Jupiter, how long it takes to orbit Jupiter

Gathered Information and factsEdit

Jovian Moon is scientifically known to be Jupiter's moon. Jupiter is known to have 4 main interesting moons. For many years Jupiter has been known to have 16 moons. Over the years astronomers have founded several others moons and satellites. 23 new moons were founded, which probably is only asteroids captured by Jupiter's gravity, have been announced for Jupiter. 11 other moons were founded, which were: Themisto, Iocaste, Harpalyke, Praxidike, Taygete, Chaldene, Kalyke, Callirrhoe, Megaclite, Isonoe, Erinsome. The names come from characters in the life of Zeus in Greco-Roman mythology. There are 60 moons that have been discovered around Jupiter. There are four closer than Io. The outer 33 moons all orbit Jupiter in a direction opposite to that which Jupiter spins, which leads scientists to believe they are captured asteroids.

2. Jupiter's Moons

The moons are in order by the distance they are from Jupiter it self.


- closest moon to Jupiter
- 25 miles/40 kilometers in diameter
- orbits 79,500 miles/128,000 kilometers from Jupiter
- has a mass of 9 * 10 kg to the 16th power
- it orbits Jupiter in 0.294780 Earth days
- discovered by Stephen Synnott (Voyager 2) in the 1980s


- second-closest moon to Jupiter
- 12 miles/20 kilometers from Jupiter, within its main ring
- Adrastea and Metis are said to be the source of the dust in this

ring mass

- has a mass of 1.91 * 10 kg to the 16th power
- orbits Jupiter in 0.29826 Earth days
- discovered by E. Jewitt and E. Danielson (Voyager 2) in 1979   


- thired closest moon to Jupiter
- reddest object in the solar system
- 145 * 91 * 83 miles/232 * *146 *134 kilometers in diameter
- orbits 112,700 miles/181,300 kilometers from Jupiter, within the faint Gossamer ring
- Amalthea and Thebe likely provide the dust from the Gossamer ring
- has a mass of 7.2 * 10 kg to the 21 power
- orbits Jupiter in 0.49817905 Earth days and it is in synochronous roation- same side always facing Jupiter
- gives off more energy than it receives from the Sun
- discovered by Edward Emerson Barnard in 1892


- fourth closest moon to Jupiter
- 68 * 56 miles/110 * 90 kilometers in diameter
- orbits 138,000 miles/222,000 kilometers from Jupiter
- has a mass on 8 * 10 kg to the 17th power
- orbits Jupiter in 0.6745 Earth days and is also in synchronous rotation
- discovered by Stephen Synnott (Voyager 1) in 1980


- is a large, rocky, vocanically active moon of Jupiter 
- a very colorful moon because its volcanoes let out something called molten sulfur
- third largest moon 
- 1, 942 miles/3,636 kilometers in diameter, which is close to the size of our moon 
- mean distance from Jupiter is 220,000 miles/422,000 kilometers 
- has a mass of 8.93 * 1022 kg 
- takes 1.77 days to orbit Jupiter 
- doughnut-shaped plasma cloud around Jupiter near Io's orbit, known as the "Io plasma torus"; caused by Jupiter's strong magnetic field 
- independently discovered by Galileo and Marius in 1610 
- most volcanically active body in the solar system
- volcanoes are driven by hot silicate magma. 
- one of the only three moons with an atmosphere in the solar system


- is a large, dense, icy moon of Jupiter 
- is the smoothest object in our Solar System
- surface is covered with long, crisscrossing trackways, but few craters  
- frozen sulfuric acid has been found on its surface 
- 2,000 miles/3,138 kilometers in diameter  
- smaller than the Earth's moon 
- 3.55 days to orbit Jupiter in a synchronous orbit 
- mean distance from Jupiter is about 420,000 miles/670,900 kilometers 
- has a mass of 4.80 * 1022 kg  
-  independently discovered by Galileo and S. Marius in 1610
- surface is mostly water ice
- evidence that it may be covering an ocean of water or slushy ice.
- thought to have twice as much water as does Earth
- potential for having a 'habitable zone.'



- is the largest moon of Jupiter 
- a large, icy, outer moon that has marks on it from impact craters and various parallel faults 
- 3,400 miles/5,268 kilometers in diameterIt   
- orbits Jupiter at a mean distance of 664,000 miles/1,070,000 kilometers 
- has a magnetic field and i said to have probably have a molten iron core 
- takes 171.75 hours/7.15 Earth days to orbit Jupiter
- has a mass of 1.48 * 1023 kg 
- independently discovered by Galileo and S. Marius in 1610 
- largest moon in the solar system (larger than the planet Mercury), If not bound to Jupiter, it would be considered a planet in its own right
- Geologists think that it used to have plates, like the Earth, but they froze together soon after Ganymede's birth
Callisto3 gal big


- a large, icy, dark-colored, low-density outer moon of Jupiter 
- 3,000 miles/4800 kilometers in diameterIt  
- the second-largest moon of Jupiter; it is roughly the size of Mercury  
- has the largest known impact crater in the Solar System 
- orbits Jupiter at a mean distance of 1,170,000 miles/1,883,000 kilometers 
- has a mass of 1.08 * 1023 kg 
- takes 400.8 hours/16.7 days to orbit Jupiter in a synchronous orbit  
- independently discovered by Galileo and S. Marius in 1610
- surface is extremely heavily cratered and ancient - a record of events from the early history of the solar system
- the outermost of the Galilean moons
- Every square mile is covered with craters or other signs of bombardment


- Jupiter's ninth and smallest moon 
-  9.9 miles/16 km in diameter  
- orbits at an average of 6,900,000 miles/11,094,000 km from Jupiter
- has a mass of 5.68 * 1015 kg 
- orbits Jupiter in 238.72 Earth days  
- discovered by Charles Kowal in 1974


- Jupiter's tenth moon 
- 110 miles/170 kilometers in diameter  
- orbits 7,000,000 miles/11,480,000 kilometer from Jupiter 
- has a mass of 9.5 * 1018 kg 
- orbits Jupiter in 250.5662 Earth days
- discovered by C. Perrine in 1904


- Jupiter's eleventh moon 
- 15 miles/24 kilometers in diameter  
- orbits 7,200,000 miles/11,720,000 kilometers from Jupiter 
- has a mass of 8 * 1016 kg 
- orbits Jupiter in 259.22 Eart days  
- discovered by S. Nicholson in 1938


- Jupiter's twelfth moon 
- 50 miles/80 kilometers in diameter  
- orbits 7,250,000 miles/11,737,000 kilometers from Jupiter 
- has a mass of 8 * 1017 kg 
- orbits Jupiter in 259.6528 Earth days 
- discovered by C. Perrine in 1905


- Jupiter's thirteenth moon 
- 12.5 miles/20 kilometers in diameter  
- orbits 13,100,000 miles/21,200,000 kilometers from Jupiter 
- has a mass of 4 * 1016 kg  
- orbits Jupiter in 631 Earth days and is in retrograde- orbiting opposite to the direction of Jupiter 
- discovered by S. Nicholson in 1951


- Jupiter's fourteenth moon  
- 18.5 miles/30 kilometers in diameter 
- orbits 13,800,000 miles/22,600,000 kilometers from Jupiter 
- has a mass of 9 * 1016 kg  
- orbits Jupiter in 692 Earth days and is in a retrograde orbit  
- discovered by S. Nicholson in 1938


- Jupiter's fifteenth moon  
- 22 miles/36 kilometers in diameter 
- orbits 14,600,000 miles/23,500,000 kilometers from Jupiter 
- has a mass of 2 * 1023 kg  
- orbits Jupiter in 735 Earth days and is in a retrograde orbit  
- discovered by P. Melotte in 1908


- Jupiter's sixteenth moon
- 17.5 miles/28 kilometers in diameter 
- orbits 14,700,000 miles/23,700,000 kilometers from Jupiter
- has a mass of 8 * 1016 kg. 
- orbits Jupiter in 758 Earth days and is in a retrograde orbit  
- discovered by S. Nicholson in 1914

Quick Facts of JupiterEdit

Mass: 1.900 * 1027kg

Rotation: 0 day, 9.925 hours

Volume: 1.377 * 1015km3

Tilt: 3.13 degrees

Temperature Range: -163 degrees Celcius to -121 degrees Celcius.

Rings: Yes

Asmosphere: Hydrogen, Helium, Methane

Composition: Hydrogen and Helium

Winds: Up to 150 m/s

Moons: 60 confirmed (March 2003 52 were confirmed and April 2003 8 more were confirmed and made a total of 60)

Average Distance from Sun: 778,330,000km

Orbital Period: 11 years, 315 days, 1.1 hours

Magnetic Field: extends 1,600,000km

Jupiter's ring system is said to be formed by dusk kicked up as interplanetary meteroids crashed into the giant planets four small inner moons: Almathea, Thebe, Adrastea, and Metis.

Discoverers of Jovian MoonsEdit

Charles T. Kowal spotted a Jovian moon in 1974 and went back a year later, September 1975, to pinpont the position of the moon again.

David C. Jewitt and colleague Scott S. Sheppard from the University of Hawaii went on a search because they thought the 1975 object was just a misidentification. On their search they founded 11 other moons.

Brian G. Marsden of Harvard-Smithsonian Center of Astrophysics in Cambridge, Mass. He observed and studied the body's orbital data. As he went on with his studies he noticed it was the same exact object Kowal had found 25 years before.

Jovian Moon Fiction


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