Atomic Age - The 1st Satelite was launched at the end of the atomic age thus dawning the space age. This first satelite was known as Po after the myth and the farthest planet in the soloar system. In Naucean mythology Po was Sina's (The Goddess Nauceania's Youngest Daughter) pet flowit. Sina threw a rock deep into the galactic ocean and Po went out to get it. But the current was too strong and he could not return. Thus thats is why the planet Po is so far away from the planet.
Rocket Age - Stage Rocket. This has 4 stage that broke off and the conical capsule at the top could fly around like a primitive shuttle. They used these to build the first space stations.
Modern Age - Space Shuttle on a Rocket. This has rocket boosters to get up into space and then flew around like Earths shuttles. Thenwhen they had to come back they would glide down unlike before where it would just fall down and land in the ocean. These were the first to visit Sina and Sirenia.
Digital Age - These could take off from spaceports and visit space stations, moon bases and even the first piloted missions to Whiro and Oro.
Biotech Age - These were used to visit and establish colonies around the soloar system. The first bases were military only and did not become domestic until after the Robot War.
Robotic Age - These were the first true UFOs and were used for battling against the Robotic uprising. They had anti-gravity, beam technology and even the first primitive terraforming.
Nano Age - These ultimately won the war against the Robotic uprising. thanks to nano technology they gave an advantage over the Robots. It against many new features like cloaking, anti-matter cannon, adaptive nano systems, cold fussion, and even the first pre-interseller drive which made travel around the soloar system take just a few mins.
Galactic Exploration Age - This was the biggest step with the interseller drive and the "planet killer" weapon. These were used to explore the closest stars and many new alien species.
Universal Age - This godly craft runs on zero point energy and can travel in time, dimensions, and universes. This was eventually created after having worked with alien species and sharing technology and information.
On a side note the Nauceans are in the Galactic Exploration Age currently with CAB.