Basic Premise: The Stargate has always had 9 lock points. It was just that most of the platforms that hold the gate, and provide a convenient ramp to access it, result in the bottom two being mostly concealed.
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| SG1 Gate | Atlantis Gate | Universe Gate |
A basic Stargate address is comprised of 7 “chevrons”. These depict various constellations, and the initiating gate’s point of origin.
At one point during the original series, Jack O’Neil’s brain became overloaded when an alien database downloaded into his brain. However he was apparently mentally advanced enough to recover make use of both the design for the device known as the “Dial Home Device” or “DHD”", as well as reconfigure the computer they used for a makeshift DHD to not only contain a full list of all Stargates in the galaxy, but to make it so it could add an 8th chevron. With additional power, the 8th chevron acted like an area code to specify which galaxy the 6 chevrons were relative to.
After the end of Stargate Atlantis, when Atlantis was now on earth, extended research into the ship/computer’s database discovered a 9 chevron address. With extensive searching and more information gathered from the database, a special planet with a molten “Naquadria” core. A special Stargate had been built on the planet to access the enormous power of the planet so it could dial the 9 chevron address.
This Stargate not only dialed normal stargates, and in theory the 9 chevron address, but it also had been configured to not accept incoming connections for reasons of “safety”. If this was in reference to the unstable core of the planet, or just security was not specifically mentioned. However trips to the planet had to be made in ships.
However, while they could dial normal addresses, they could not get the “power requirements” correct to dial the 9 chevron address. The answer to the problem was in a formula written in ancient that nobody could figure out. To try and pull in more resources covertly, and most likely to start helping prepare the world to find out about everything, the Air force created at the inspiration of the daughter of the senator primarily responsible for supporting the project, a online game who’s ultimate level is the solving on the ancient formula. The gamer that solved the formula, who had to drop out of MIT to help his sick mother, was recruited to go to the planet to help finish implementing the solution.
However when they tried to dial the address, while they got father then they had before, they could not get the final chevron to “engage”".
Later, the base came under attack, and the order was given to evacuate the people in the base through the stargate back to earth. However the scientist who had been working on the project for years and had dedicated his life to the project, couldn’t let go and just evacuate as he feared he may never get a chance to come back and complete his work. With some quick thinking, he and the gamer realized that unlike a normal address where the last chevron is the gate’s point of origin, a slight safety feature had been added where the last chevron was earth’s symbol. The scientist then chose to dial the 9 chevron address not knowing what was on the other side, and because of time, everyone had to evacuate there, taking any supplies (only labeled with barcodes :/) though with them.
It turns out that the address leads to a spaceship called the Destiny on the other side of the universe. When he ancients created it, they were not aware of the ability to become “ascended” beings of energy on a higher plain of existence. So as per there scientific and pragmatic nature, they assumed the would continue to expand there explorations from one galaxy to another until they had explored the universe. So they launched a collection of ships that were fully automated, to explore other galaxies, find habitable planets, and create stargate networks in each galaxy. They then launched an exploration ship that was also fully automated, to follow behind, and perform more extensive research on each planet.
The ship had apparently been launched between 100,000 and 200,000 years ago. It uses faster then light travel, but does not seem to use “hyperspace” like later ancient ships, and most other races do. While obviously well automated, after so long, the ship they found is suffering from significant damage, with the majority of secondary systems not functioning, or operating at reduced capacity, and even primary systems seeming to be on there last legs.
In the first two parts, the Senator who was visiting the base was one of the unsuspecting people evacuated to the ship. However apparently because of the distance, everyone came out of the stargate going a bit faster then when they entered causing many people injuries. This included the Senator who suffered internal injuries. He also had a heart problem that required medicine that thinned his blood, which led to a loose loose situation. Risk death from a bad heart, or bleed to death internally. When a situation arrived where the air was leaking into space though a damaged section that could only be sealed from the inside of the damaged area, he sacrificed his life for both the people on the ship and his daughter who is one of them, and closed the section off, resulting in him suffocating to death.
in⋅tol⋅er⋅ance 
Looking through the history of mankind for many years, as well as watching the current status of humans, I have determined that humans are afraid of the unknown. While this has also been known by humans for awhile, I have furthered observed that humans respond to fear in a three step process.
