As I said, I was not arguing about regulation being bad. My point was its completely false to say that earth based astronomy is over. A minority of telescopes are not effected or slightly effected. But even small effects now will grow if you imagine sats going exponential.

The very broad survey orient visible telescopes are most effected of course.

Regulation both for visibility and for debris is warranted. But getting their by streaming 'earth astronomy is over and Kessler syndrome' is pretty counter-productive. If we can get away from that kind of language maybe we can actually make reasonable progress on these questions.

Unfortunately I can not find the series of lectures from astronomers and SpaceX. That had really go information. But there is an active working group somewhere that is meeting regularly that can probably be found somewhere.