Megaspace / Pseudo-gravity
There are only two ways to generate real gravity: with a large mass, or by rotating an object continuously. Both are impractical aboard a starship?. Luckily, it turns out there is an energy field that attracts mass the same way a magnet attracts iron. Apart from its obvious use to simulate gravity on board and counter a ship's acceleration, it has also found applications in deflector shields and tractor beams?.