Re: Astronomy tax
> You're right in principle but wrong in fact.
Hmm, going to have to disagree on that score.
> The light pollution on earth affects the ... hobby astronomers ... but not the main telescopes and observatories
There really is no such thing as "the main" telescopes. There are the big 'scopes, which are gorgeous and lovely but very few, and there is the (relatively) huge fleet of 'scopes run by amateur astronomers (note: amateur, not hobbyist - seriously!).
Astronomy is unique amongst sciences today in that the amateurs are *still* an important resource: they can, and do, devote huge numbers of hours of 'scope time to monitoring targets that aren't on the schedules for larger instruments - including those that just swamp out the big boys, namely the bright planets in the Solar System.
There are, of course, hobbyist star gazers as well, and more joy to them, but please don't discount the importance of the hardy and dedicated amateur astronomers.
> but not the main telescopes and observatories
Not now, because they have been forced to move to all the remote locations! The move of the Isaac Newton instrument from Herstmonceux to Hawaii was not universally greeted with joy in the locale. It made scientific sense, with the encroaching lights of Eastbourne and the obviously greater number of cloudless days away from the Channel, but it - and all similar moves - cost greatly in allowing observing time to be used for training up the next generation and for engaging local public interest. This was a few decades ago now, but that just shows that this is another of those long-term, creeping, problems that just allows too many people to shrug their shoulders and say it has been that way all of their life, nothing to do about it, we can't go backwards - as though it is some inevitable law of nature that things must get worse (no, that is *not* what entropy is all about!)
> But light pollution does have measurable effects on insects and birds
And mammals, including humans (hanging heavy blackout curtains works but hardly makes for a light and airy living space the rest of the time, looming all the time).