On Wed, 26 Jan 2011, Richard Mallett wrote:
>
> The IAU definition of a planet as an object orbiting the Sun that has cleared
> its neighbourhood seems to me to be seriously flawed, as it excludes :-
>
> extra-solar planets (which don't orbit the Sun)
> Earth (because there are near Earth objects)
On 25/09/2010 05:01, Roger Bailey wrote:
Hi Jim,
For me, Pluto is a planet. This is based on what led to its discovery, not
the rewriting of science and history by the the new generation that knows
everything and values nothing.
For a while I was on the advisory board for the Lowell Observator
s an
excellent guide.
Best wishes,
Jackie
-Original Message-
From: sundial-boun...@uni-koeln.de [mailto:sundial-boun...@uni-koeln.de] On
Behalf Of Brent
Sent: 24 September 2010 19:47
To: Sundial
Subject: Re: moon shadows
> Hello, I am afraid that if you wanted to make the sort of
observ
--
From: "J. Tallman"
Sent: Friday, September 24, 2010 12:07 PM
To: "Roger Bailey"
Subject: RE: moon shadows
> Hi Roger,
>
> I thought Pluto was not a planet anymore!
>
> Jim Tallman
> www.artisanindustrials.com
> jtall...@artisanindustrials.com
>
depending on where you live).
Ross
> Date: Fri, 24 Sep 2010 11:46:50 -0700
> From: bren...@verizon.net
> To: sundial@uni-koeln.de
> Subject: Re: moon shadows
>
> > Hello, I am afraid that if you wanted to make the sort of
> observations that you suggest to any accu
> Hello, I am afraid that if you wanted to make the sort of
observations that you suggest to any accuracy then the gnomon set up
that you have used is incorrect. It should be set to point to true
north (not
> compass north) and be at an angle to the horizontal which is equal
to your latitude
In general the full moon is directly opposite the sun, both in longitude and
declination. It is 12 hours, 180° out of phase and the sign of the
declination is reversed The sun, moon and planets generally follow a path
through sky called the ecliptic as this is where eclipses happen.
This is th
