Re: The Science-y Stuff Thread
You still need expend the fuel to get all your equipment up to the same speed and direction as the comet. Since the comet is most likely not going exactly where you want it to, you then have to spend additional energy to correct its course. At that point you are better off just accelerating your equipment to the proper vector by itself.
The Enterprise uses anti-matter as its primary energy source, with fusion reactor backups (I bought my mom the Star Trek Technical Manual years ago).