James Webb Telescope: Moon Formation & Cosmic Extremes
- Here's a breakdown of the key information from the provided text, focusing on the formation and composition of Jupiter's moons, particularly Ganymede and Callisto:
- * Ganymede and other moons around Jupiter likely formed from a circumpy disc billions of years ago.
- * ganymede and Callisto are approximately 50% water ice.
Here’s a breakdown of the key information from the provided text, focusing on the formation and composition of Jupiter’s moons, particularly Ganymede and Callisto:
Formation:
* Ganymede and other moons around Jupiter likely formed from a circumpy disc billions of years ago.
* Their orbits are nearly in the same plane (coplanar), similar to the planets around our Sun, suggesting thay formed within an accretion disk.
* This disk was influenced by temperature and the presence of molecules like water, organic materials, silicates, and carbon dust.
Composition:
* ganymede and Callisto are approximately 50% water ice.
* They likely have rocky nuclei perhaps composed of carbon or silicon.
In essence, the text describes a formation process similar to planet formation, but on a smaller scale around Jupiter, and details the icy, rocky composition of its larger moons.