I am particularly interested in why we are on a planet that is so rich in phosphorus and the final phrase about "delivery of chemically enriched material to planetary atmospheres" is a real tease.
These are really interesting papers and full of pics and diagrams, although the math is beyond me.
I'm confused though... doesn't our own Saturn have a circumplanetary disk?
What is new here is the clear observation of a circumplanetary disk around an exoplanet. Such disks are where moons are formed, so this is the first observation of a moon-forming process outside of our solar system.
Is that really true? We've never seen moons forming elsewhere in the universe?
Remember that we cannot even see exo-planets visually (with one or two very nearby exceptions).