Edited by: Tau Cabalander on 16/10/2010 17:04:02
Plasma Thrusters are T2 ship components. There is blueprint for them. They require raw T2 materials that can only be harvested from a moon (and then reacted).
You will have to buy moon materials or finished components to build T2 stuff.
Moon mining (and reacting) can only be done in 0.3 or lower security systems using a POS. Some moons are very valuable, worth billions of ISK per month, so alliances constantly fight over them using fleets of hundreds of capital ships. Some moons are virtually worthless and ignored by the big alliances; individuals mine them only to help pay a little bit of their POS fuel costs.
See the Science & Industry