If you remember my old blog from almost two years ago about chondrule formation when you might not be surprised that we had some more of the “entertaining” discussions this morning. The chondrule session was on and they scheduled the most controversial presentation last which was a very good move as we overran the session quite substantially just because o the follow-on discussion.
Essentially there is still no agreement about the heating events for these chondrules and you can take your pick if you prefer a single large scale event (like a shockwave going through the solar system) or loads of small ones (like lightning strikes) or anything in between (just think of planetesimals impacting each other). Each of these can explain some of the observed data but none can explain it all and that’s where it gets stuck. The vast amount of data from all those different meteorites is rather a hindrance than a help as anybody can just pick the data they want to explain only for another scientist to come along and claim that something else is not explained in that model. Explaining just about everything just makes things very complex and it will probably take some time to solve this which will make for lots more of those entertaining discussions to come.
But unresolved questions aside, it’s always nice to see that there are some proper discussions going beyond the too often used phrase “very nice work” and a follow-up trivial question.