Re: What Is "Alloy"?

On Sat, 12 Apr 2008 08:13:17 -0700 (PDT), frkrygow@xxxxxxxxx may have
said:

On Apr 12, 12:18 am, "b...@xxxxxxxxxxxxxxxxx" <b...@xxxxxxxxxxxxxxxxx>
wrote:
On Apr 10, 8:40 am, frkry...@xxxxxxxxx wrote:


But with that thing, you _will_ want to waste plenty of light by
sending it upward, rather than onto the road. Otherwise, the next
time you pass under a bridge, you'll lose the top few meters of your
reflector.

On the contrary, as an astronomer, I am extremely
sensitive to light pollution issues. Properly baffled
light sources are very important.

Off topic, but I strongly agree.

I grew up in city/suburbs, but still loved the night sky. I recall
when the local planetarium opened, and the astronomer projected a
synthetic sky I'd never seen, with no constellations I could
recognize. He then dimmed all the stars, and at about half power,
things looked "normal."

And I recall my first trip west, when I first learned saw the Milky
Way, plus a million other stars. And when I first learned that M81
was, indeed, visible to my naked eye. I literally saw what I'd been
missing.

In the aftermath of Hurricane Andrew, light pollution in southern Dade
County, Florida was drastically reduced, and many people there saw the
true night sky for the first time in their lives. The reaction was
amazing; people literally had no concept of just how full of stars the
dome really is.

I have met lifelong urban dwellers who have honestly professed to have
never seen more than a few dozen stars overhead.

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Relevant Pages

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