I think it started out with three space ships in space crossing a asteroid field. One battle ship on each side of what I think they were protecting. Then a guy space walked a "space mine" onto a side of an asteroid and when the asteroid made a 180 it blew up an alien spaceship.
It also had a Space station around earth, they went into how hard it was to build it and all the mistakes they made to make it. It looked like it had three cylinders attached together, the middle one going in a opposite direction. Made that gravity effect.
Toward the end of it the aliens had this web-like ship, very big and spread out covered in a dark cloud when it was on its way to blow up Earth. The humans had all their ships ready to defend and also made these two ships that the aliens didn't want to blow up because they had a different configuration. But a traitor gave the blueprints to the aliens so that he could survive. Then one of the two ships rammed into to web-like thing because they could only shoot ones and they shot at the wrong "Web connection". Aliens ran because there web-like thing blew up, but not before they poisoned the Earth's air. Then the last ship of the two went onto a quest to find a cure.