The quantity of antimatter produced, of course, depends on how bright the star is. It's also used as fuel by jumpships. Organics Organic material is required to maintain the crews of your units, and more importantly, their bioelectric control systems tend to die without it. It is made by hydroponics plants, which colonise carbonaceous asteroids with greenhouses. You need both the asteroids and sunlight to produce organics.
Units require a small amount to run, and a slightly larger amount to build.
If one of your units needs some consumables but can't get them, it will die and go out of commission. You'll lose it. There are strict rules as to where units get their consumables from. Mobile units will always try to find a cargoship in the same fleet. If one of the cargoships can provide the material required, so be it.