Members
Simulations suggest there may have been several generations of Galilean satellites in Jupiter's early history. Each generation of moons to have formed would have spiraled into Jupiter and been destroyed, due to drag from Jupiter's proto-lunar disk, with new moons forming from the remaining debris. By the time the present generation formed, the debris had thinned out to the point that it no longer greatly interfered with the moons' orbits. Io is anhydrous and likely has an interior of rock and metal. Europa is thought to contain 8% ice and water by mass with the remainder rock. These moons are, in increasing order of distance from Jupiter:
| Name |
Image | Model of Interior I E G C |
Diameter (km) |
Mass (kg) |
Density (g/cm³) |
Inclination (°) |
|||
|---|---|---|---|---|---|---|---|---|---|
| Io Jupiter I |
3660.0 ×3637.4 ×3630.6 |
0893 !8.93×1022 | 3.528 | 421,800 | 1.769 (1) |
0.050 | 0.0041 | ||
| Europa Jupiter II |
3121.6 | 0480 !4.8×1022 | 3.014 | 671,100 | 3.551 (2) |
0.471 | 0.0094 | ||
| Ganymede Jupiter III |
5262.4 | 1480 !1.48×1023 | 1.942 | 1,070,400 | 7.155 (4) |
0.204 | 0.0011 | ||
| Callisto Jupiter IV |
4820.6 | 1080 !1.08×1023 | 1.834 | 1,882,700 | 16.69 (9.4) |
0.205 | 0.0074 |
Read more about this topic: Galilean Moons
Famous quotes containing the word members:
“It took six weeks of debate in the Senate to get the Arms Embargo Law repealed—and we face other delays during the present session because most of the Members of the Congress are thinking in terms of next Autumn’s election. However, that is one of the prices that we who live in democracies have to pay. It is, however, worth paying, if all of us can avoid the type of government under which the unfortunate population of Germany and Russia must exist.”
—Franklin D. Roosevelt (1882–1945)
“Consider the value to the race of one-half of its members being enabled to throw aside the intolerable bondage of ignorance that has always weighed them down!”
—Bertha Honore Potter Palmer (1849–1918)
“I believe that the members of my family must be as free from suspicion as from actual crime.”
—Julius Caesar [Gaius Julius Caesar] (100–44 B.C.)