According to my own calculation:The speed of the Moon:29 (synodic period) * 86400 = 2505600
360 / 2505600 = 0,0001436 degrees / sec
27,3 (sidereal period) * 86400 = 2358720
360 / 235870 = 0,001526 degrees / sec
The speed of the Sun:360 / 86400 = 0,004166 degrees / sec
What this means?This means that the
retrograde motion of the Moon (with respect to the Stars) is faster than the retrograde motion of the Sun (with respect to the Stars)!!!
So, it is really odd that whenever you come across the various articles on internet about this issue, you always see this type (see above) of reckoning / comparing the speeds of the Moon and the Sun.
So, is this deliberate or accidental misinterpretation?
What is actually wrong here?
If we presumed that the Moon and the Sun have exactly the same orbits, then we would have to conclude that because retrograde motion (with respect to the Stars) of the Moon is faster than the retrograde motion of the Sun, apparent forward (East - West) motion of the Sun is faster than the apparent forward (East - West) motion of the Moon.
I would say that this is the logic that Alpha2Omega rely on.
So, everything depends on the real shape (width, eccentricity) of an actual orbits of the Moon and of the Sun.When Dr. Seligman says this:
It is easier to see the motion of the Moon than of the Sun for two reasons -- it is much faster and you can see stars when the Moon is near them, but NOT when the Sun is near them. However, it is possible, by measuring the right ascension and declination of the Sun, to see that it does follow almost exactly the same path as the Moon, but much more slowly. Source :
http://cseligman.com/text/sky/moonmotion.htm...what
Dr. Seligman actually means by these words?
Does he talk about forward motion of the Moon and the Sun or he talks about retrograde motion (with respect to the Stars : direction West - East) of the Moon and the Sun?
Now the question is this:
Is it possible that the Moon moves much faster (than the Sun)
forwardly (East - West)
and retrogradely (with respect to the Stars : West - East)
in the same time?
It is, and it must be so, because it is measurable and from my own experience (observations) i can tell you that this is the fact: The Moon moves much faster than the Sun
forwardly (East - West)!!!
One interesting testimony:My fiancee was standing in our room last night looking at a a crescent moon in the sky. she told me to come and check it out because it looked like a Cheshire Cat smile. So I go up to see what it looked like, and indeed it did look like a Cheshire Car smiling. Now here is where I got a little confused.
When I got upstairs, the moon was still reasonably high in the night sky, however, as I sat there within a minute or two, it had droped fast and disappeared behind the Rockies, no more moon for th rest of the night. Mind you this was at about 9:30. We both looked at each other remarked at how fast that just happened.
My question is, does anyone know how fast the moon is supposed to move through the night sky? It just seems that the moon shouldnt be gone for the night at 9:30. Shouldn't it be up for longer? And why did it seem to move so fast?
Any thoughts or ideas? One another discussion on the same topic which shows how people are terribly confused about this issue:
http://www.thestudentroom.co.uk/showthread.php?t=2719816