7th chevron?

[handya]

i know that the 7th is point of origin, but with only 39 symbols how does that work you could only have 39 points of origin or gates? what am i missing?

[jnadreth]

There are only 39 symbols per gate.

There are more than 39 symbols throughout the galaxy-probably 100's-1000's

[Darynlxm]

Since Im horrible at math, I wiki-ed this for you.

Milky Way

A Milky Way stargate has 39 inscribed symbols on the inner ring. When dialing, this inner ring rotates until the dialed symbol is aligned with the seventh chevron, at which point the ring pauses, the seventh chevron moves down and up, and the appropriate chevron in the sequence engages. In the Stargate SG-1 series, an engaged chevron glows red. In the original Stargate film, all of the chevrons use this motion, and none of them glow red.

With 38 symbols, the Stargate Network in the Milky Way has:

(38×37×36×35×34×33) = 1,987,690,320 possible 7-symbol addresses.
However, not all points in space represented by these addresses have stargates, in fact, there are sufficiently few valid coordinate sets that randomly dialing the stargate is largely futile. If the person dialing does not know the point-of-origin symbol, there are many more possible combinations.

Because the gate on Earth was found without a DHD, the stargate team on Earth developed the technology to interface with the gate in order to power it and dial it by the use of computers. (This is essentially an automated version of 'manual dialing'.) When using a DHD, however, each chevron is activated immediately upon entry of the symbols, without the inner ring spinning. This allows for a much faster dialing process.

______________________________________
So, while the stargate in the milky way on has 39 symbols on it, each gate itself would have its own P-of-O.

Does that help?

http://en.wikipedia.org/wiki/Stargate_(device)

Se section 5.1 on wiki.

[Lord Excalibar]

i dont suppose ther is a simple explanation to wat u just sed.

[Mclean]

(38×37×36×35×34×33) = 1,987,690,320 possible 7-symbol addresses.

That's a LOT of potential gate addresses!

[Fan-e-Gate]

In general terms:
38 ordinary chevrons on a DHD/gate
AND 1 special chevron special to each DHD/gate combo-this acts as the 7th chevron. Maybe it is located in the same place on each DHD allowing for quick access

So whenever a team wants to dial back home (from offworld), they dial Earth's six chevrons and find that one special/unique chevron.

exceptions:
I remember (very vaguely so I could be wrong) that some DHDs have totally different chevrons suggesting that they are the only portal to certain gate "subnetworks". This would mean that there are technically more than just 38 ordinary chevrons

Of course if anyone has ever read my previous posts-I still believe the seventh chevron is a joke because where else would (read: could) you be dialling from but the point of origin. Unless remote dialling between 2 gates from a 3rd gate was possible.
Then again I should not pretend to understand the full physics since it took the Ancients a while to master it (presumably) while I have only had 12 or so years with out of focus screenshots and flippant descriptions.

[The Prophet]

1,987,690,320 possible 7-symbol addresses.

2,000,000,000 to 4,000,000,000 Stars in the Milky Way.

Of course, not all of them have planets orbiting, or M-Class Planets either.

So, there's just enough addresses to cover every single, or up to half the Stars in the Milky Way, if potentially they all had Planets orbiting.

Nice.

[Inquisitor]

There can be different point of origin symbols..

Earth, Abydos, Gamekeeper planet (tornado) just to name a few

[Quadhelix]

i know that the 7th is point of origin, but with only 39 symbols how does that work you could only have 39 points of origin or gates? what am i missing?

Well, I suspect that the point of origin symbol on the 'Gate simply tells it: calculate a path to the destination based on our current location.

Also, in addition to the many unique points of origin, I have the suspicion that many 'Gates might share a point of origin.

1,987,690,320 possible 7-symbol addresses.

2,000,000,000 to 4,000,000,000 Stars in the Milky Way.

Of course, not all of them have planets orbiting, or M-Class Planets either.

So, there's just enough addresses to cover every single, or up to half the Stars in the Milky Way, if potentially they all had Planets orbiting.

Nice.

I did a little calculation, and found that if the set of all 'Gate addresses forms a sphere 100,000 light years in diameter, and if all seven-chevron addresses define cubic regions of the same size, then each cubic region should be about 65 light years across.

I know that the galaxy is a disk, not a sphere. However, even using a cylinder 50,000 light years in radius and 10,000 light years in thickness, I still find that each 'Gate address would be about 15.8 light years across. A quick look at Wikipedia shows that, even were Earth at the edge of its 'Gate address, there are quite a few other stars that would share that address (indeed, if Earth is near the center, then all of the stars on that map would share Earth's address).

[Ed]

1,987,690,320 possible 7-symbol addresses.

2,000,000,000 to 4,000,000,000 Stars in the Milky Way.

Of course, not all of them have planets orbiting, or M-Class Planets either.

So, there's just enough addresses to cover every single, or up to half the Stars in the Milky Way, if potentially they all had Planets orbiting.

Nice.

Wow thats realy neatand ther will be some that go to moons which compensates for the rareity of class m planets plus the fact some planets will be useful despite being uninhabitable naquada rich ones for example and so probly have stargates.

Also i think the first 38 stargates built probly used standard glyphs for PoOs

[Lord Excalibar]

Wow thats realy neatand ther will be some that go to moons which compensates for the rareity of class m planets plus the fact some planets will be useful despite being uninhabitable naquada rich ones for example and so probly have stargates.

Also i think the first 38 stargates built probly used standard glyphs for PoOs

nice work.

[aretood2]

In general terms:
38 ordinary chevrons on a DHD/gate
AND 1 special chevron special to each DHD/gate combo-this acts as the 7th chevron. Maybe it is located in the same place on each DHD allowing for quick access

So whenever a team wants to dial back home (from offworld), they dial Earth's six chevrons and find that one special/unique chevron.

exceptions:
I remember (very vaguely so I could be wrong) that some DHDs have totally different chevrons suggesting that they are the only portal to certain gate "subnetworks". This would mean that there are technically more than just 38 ordinary chevrons

yeah, I like this answer over the others.

Of course if anyone has ever read my previous posts-I still believe the seventh chevron is a joke because where else would (read: could) you be dialling from but the point of origin. Unless remote dialling between 2 gates from a 3rd gate was possible.
Then again I should not pretend to understand the full physics since it took the Ancients a while to master it (presumably) while I have only had 12 or so years with out of focus screenshots and flippant descriptions.

I guess the point of the point of origin is to tell the gate to dial. That's the I can come up with. And I know that the DHD has a large button in the middle. But hey, there is nothing wrong with redundancy.

And what's with the term M-Class? What is this, Trekkworld.com?

[Lord Excalibar]

yeah, I like this answer over the others.

ok i dont no y.

I guess the point of the point of origin is to tell the gate to dial. That's the I can come up with. And I know that the DHD has a large button in the middle. But hey, there is nothing wrong with redundancy.

no there isnt.

And what's with the term M-Class? What is this, Trekkworld.com?

[Lord Excalibar]

I guess the point of the point of origin is to tell the gate to dial. That's the I can come up with. And I know that the DHD has a large button in the middle. But hey, there is nothing wrong with redundancy.

no there isnt.

And what's with the term M-Class? What is this, Trekkworld.com?

sorry about the double post.

[ManiacMike]

I wish they would bring back red reputation