This page deals with my thoughts & theories behind the logic and concepts behind the show. There are links throughout the text because it's such a huge and complicated subject that this page would end up being 5MB long, lol, and not be in a logical order. So please take the side-steps and click on the in-text links as you read so that you will get all of the information I'm providing. Thanks for reading!

I remember when I was 5 years old, I knew every single constellation in the sky. However, 20 years later, the only one I can spot is Orion. Haha. Well, the first thing to go is your mind. LOL.
Ok, to begin with, there's supposed to be 39 symbols on the stargate. Six different symbols are used to address your destination planet, and one more to state your point of origin, for a total of seven different symbols. That means there are 77,519,922,480 possible combinations using seven different symbols.
I get this calculation by multiplying 39 x 38 x 37 x 36 x 35 x 34 x 33. That is because no symbol can be repeated, so the first is one of 39, the second is one of 38 remaining, etc.
Anyway, that means there are over 7-and-a-half billion planets that are possible to address.
When the show says that an 8th chevron (symbol) is used to address a planet in another galaxy, that in turn says that all of these 77-and-a-half billion-and-some planets are within our own galaxy - in our own solar system.
However, basic astronomy says that the light we see from the stars in our sky is light that was sent out many millions of years ago and it's just now getting here so that we can see it. That means those stars must be far out of our galaxy.
Info on this page verifies that if a star is 100 lightyears away, then it takes 100 years to see the light from it. So what we would see is that light from 100 years ago.
Another strange fact expressed on that page is that all the stars that make the constellations we see are different distances from earth. Without using exact measurements, one star of a constellation could be 100 lightyears away, another 50, another one 200, etc.
So how do these differences in distance determine an exact coordinance for use in the stargate since we're not plotting a constellation in a fixed spot but rather a constellation formed by stars far apart from each other?
This page has a little peice of info saying that we're a part of the Milky Way Galaxy.
So how many more galxies are out there? Information on several pages says between 80 and 120 billion galaxies exist in the part of the universe that we can see. One of those pages, just for the reference, says only 100 million. But there is a nice picture to give you an idea.
And since we have never had any technology to travel further than the moon, does space go on in all directions for eternity? Is there an end somewhere? How do we know it's not an illusion?
If you were really to go to another planet many millions or billions of light years away, the dial home address for Earth wouldn't work because that planet would see totally different constellations in their sky. Besides, the origional Stargate movie says that anyway.
Anyway, I'm not saying it's not possible. Hey, I've got an open mind. I'm just questioning myself on the logic because I've got too much time on my hands. LOL.
It's been a long while but I used to think of the actual stargate, if one existed. If a stargate existed, it's a one-way only street. So when you stick your hand in and pull it out again, you'll only get back a bloody stump and probably die from the bleeding. LOL so don't try this at home.
Getting off the subject just a little bit, I'd like to say something about myself. If I were wealthy and could go to college, I'd major or double-major in anthropology, languages and ancient languages. I'm also interested in indigenous and fictional languages. But mostly the ancient languages. The older, the better. And aliean languages could be added to that if we knew of any. LOL. However, what I do have under my belt is a 2 year degree in IT. So I can fix your computer and network computers.
But getting back to what I said about how I used to know all the constellations. I've recently looked this up on the web to reintroduce myself to them. Every site I've found says that there are 88 constellations. So, 88 possible chevrons?? :o Just a thought.
A great place to read about the constellations in a clear & easy format is here at an Amateur Astronomer's web site.
I know some of my thoughts get out of order. For the sake of setting it all straight, here's my first little diagram, Fig. 1. I'm not much of an artist, let alone trying to do this with a mouse. lol.
Here's just a little sidestep into something non-Stargate that sounds a bit Goa'uld-like.
Late last night I had a thought about space and all the times I've looked at star charts in my life, and how it seems like pictures of space (deep space) have been taken straight out from earth, and maybe deep space above earth, but not deep space below earth. Space is supposed to be completely 3D and go on for millions of lightyears in all directions, including up and down. This goes back to my universe explanation.
But here's a supporting page modeling space as best as a one-dimensional web page can. I also made three supporting figures for this thought. Fig. 2, Fig. 3, Fig. 4, Fig. 5.
Ok, so what's below us? If the known universe goes on forever, there's also forever to see above and below us.

If you have any thoughts on the things I've written here and would like to comment on, correct me, or add to, please let me hear what you have to offer at my Stargate Think Tank forum. I welcome all intelligent input. Thank you.

Links to check out

Official Stargate movie site
Official Stargate SG-1 site
SciFi channel's Stargate SG-1 site
History behind Stargate
Meet the Goa'uld
StargateFan.com
How to make a real Stargate
The Sun Gate
Ancient Forbidden Archaeology @ Xpeditions