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:
“For just as the body is one and has many members, and all the members of the body, though many, are one body, so it is with Christ.”
—Bible: New Testament, 1 Corinthians 12:12.
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—Lyndon Baines Johnson (1908–1973)
“Two myths must be shattered: that of the evil stepparent . . . and the myth of instant love, which places unrealistic demands on all members of the blended family. . . . Between the two opposing myths lies reality. The recognition of reality is, I believe, the most important step toward the building of a successful second family.”
—Claire Berman (20th century)