The beginng of the theme song...

We're off to outer space
We're leaving mother Earth
To save, the human race
Our Star Blazers

Its ending...

We'll fight the comet empire
Battle through the raging fire
Filled with the hope that Earth will survive
We'll keep peace alive with our Star Blazers

The evil comet empire must be located in the Oort cloud, that resentful realm of icy debris which, when blown by solar winds, somehow failed to become a part of our now barely living, barely thinking, but always vulnerable solar system.