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:
“If the education and studies of children were suited to their inclinations and capacities, many would be made useful members of society that otherwise would make no figure in it.”
—Samuel Richardson (1689–1761)
“... the theatre demanded of its members stamina, good digestion, the ability to adjust, and a strong sense of humor. There was no discomfort an actor didn’t learn to endure. To survive, we had to be horses and we were.”
—Helen Hayes (1900–1993)
“I understand that only the rich can be members of Dr. C---’s church. The Lord Christ, also, is therefore ineligible. I will remain outside with Him.”
—Amelia E. Barr (1831–1919)