Invisible wrote:
> I can only presume this must be due to light pollution.

You need to go out someplace like 50 miles from the nearest street light. 
It's really rather overwhelming.

> Well, photons are quantum, right?

I'm not sure you'd see a point source. You need enough surface that the 
likelihood of multiple photons reaching your eye in a short interval is 
positive.

> (Interestingly, I'm told it *is* possible to make a light source that 
> emits individual photons, one at a time, on que. And that when you do 
> this, things like the double-slit experiment still show multiple waves 
> interferring and reinforcing - despite this being obviously 
> impossible... Wave-particle duality is weird!)

It's only impossible if you think the interference is caused by waves, which 
it isn't.

-- 
Darren New, San Diego CA, USA (PST)
   Human nature dictates that toothpaste tubes spend
   much longer being almost empty than almost full.

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