We now have evidence that some form of life exists beyond Earth, at least in primitive form.

All of the gas giant planets in our solar system (Jupiter, Saturn, Uranus and Neptune) have rings.

In the Star Wars films, the Imperial TIE fighters are propelled by ion engines (TIE stands for Twin Ion Engine). While spacecrafts are fictional, real ion engines power some of today's spacecrafts.

There is no gravity in deep space.

The basic premise of teleportation-- made famous in TV's "Star Trek"-- is theoretically sound. In fact, scientists have already 'teleported' the quantum state of individual atoms from one location to another.

Tatooine, Luke Skywalker's home planet in the Stars Wars films, has two Suns-- what astronomers would call a binary system. Scientists have discovered recently that planets really can form within such systems.