[AZ-Observing] Re: The Real Blue Moon
- From: "Rick Tejera" <saguaroastro@xxxxxxx>
- To: <az-observing@xxxxxxxxxxxxx>
- Date: Thu, 31 May 2007 15:50:37 -0700
And to think I thought the big argument would be about WHEN the blue moon is
not WHAT it is. Although the classical definition is not a second full moon
in a month, this in spite of S&T retracting their article some 60 years
after the fact, is what hit has come to mean in the common lexicon.
Now if we really want to pick nits, the upcoming full moon is not the blue
moon as it occurs on 1 June at 0104UT. Since Astronomical events are
reckoned in UT, this would make the blue moon the full moon occurring 30
June at 1349UT.
A good discussion on the blue moon is found on Wikipedia, Including the
classic definition and the more common definition as we know it today. It
even supports my statement above about when the blue moon is this year.
http://en.wikipedia.org/wiki/Blue_moon
See you tomorrow
Clear Skies
Rick Tejera
President, Editor SACnews
Saguaro Astronomy Club
Phoenix, Arizona
www.saguaroastro.org
saguaroastro@xxxxxxx
-----Original Message-----
From: az-observing-bounce@xxxxxxxxxxxxx
[mailto:az-observing-bounce@xxxxxxxxxxxxx] On Behalf Of Dan Heim
Sent: Thursday, May 31, 2007 11:30
To: az-observing@xxxxxxxxxxxxx
Subject: [AZ-Observing] Re: The Real Blue Moon
Jeff,
Interesting, but I don't buy their explanation for a truly blue-colored
Moon. If one micron water droplets scatter red & green, they should also
scatter blue and violet (which have shorter wavelengths). At least that's
my understanding of scattering. Only when the wavelengths exceed the
scattering body's dimensions do you get diffraction of waves around the
body. Unless I'm missing some other optical effect here?
I read somewhere once that truly blue Moons can be caused by fine smoke
particles which can act like a filter for blue light, but now that I think
about it, that explanation suffers from the same problem.
Dan Heim
President
Desert Foothills Astronomy Club
http://www.dfacaz.org
----- Original Message -----
From: "Jeff Hopkins" <phxjeff@xxxxxxxxxxx>
To: <az-observing@xxxxxxxxxxxxx>
Sent: Thursday, May 31, 2007 11:03 AM
Subject: [AZ-Observing] The Real Blue Moon
> See
>
> http://science.nasa.gov/headlines/y2007/30may_bluemoon.htm
>
> Jeff
> --
> Jeff Hopkins
> HPO SOFT
> Counting Photons
> http://www.hposoft.com/Astro/astro.html
> Hopkins Phoenix Observatory
> 7812 West Clayton Drive
> Phoenix, Arizona 85033-2439 U.S.A.
> (623)849-5889
> (623) 247-1190 (Fax)
> www.hposoft.com
> --
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