Ship Propulsion Part 2

Warp drive, likely the most famous theory for space travel out there, thanks to the Star Trek phenomenon, is currently impossible as the theory states that a bubble is made in space-time around a ship. The bubble is then moved through space and the ship inside it doesn’t move. Although there are theories as to how such a movement is possible and even thought to have occurred already, the power needed to move a ship is massive and far down the road in scientific discoveries. If you plan to use this source of propulsion, it would be helpful to have another form of propulsion on ship as well. While warp engines are useful for long distances they would be useless for moving a ship into a specific orbit or moving short distances. Also, Star Trek has a number of other technologies you may want to think about adding that keep the ship from crashing into planets and stars while traveling at such high speeds.
Another way to travel through space is wormholes. There was at least one species, in a Voyager episode, that traveled by a matrix of wormholes through space. Hyperspace is a theory of traveling through another dimension with different rules to travel faster than light. In the Andromeda series it was depicted as a series of tunnels in space that a ship popped in and out of by activating a special engine. The same basic principle is used in the series Babylon 5 for distance travel. With the right protection from space for passengers, those theories may be the most feasible for humans.
These are just a few present possibilities for movement through space that I found. Another possibility has to do with tachyons and a theory I don’t have the faintest about has to do with quantum vacuum energy or “zero-point energy” on which I found no simple explanation. Remember that as many ideas as there are, there is no way to know how or even if such travel through space will happen for humans. The best we may ever get is to cryo-sleep for years before actually reaching another planet and exploring or colonizing it. This is your book so decide which theory you like best or make up your own. (We never know what alien technology we may be influenced by or some day use…)