Re: What Is "Alloy"?

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.

Sadly, my telescope's a lot less fun since the U.S.Postal "Service"
took over residential property ("We're exempt from your zoning laws")
and erected tall, unbaffled all-night parking lot lights about 100
yards away.

- Frank Krygowski
.

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