Luke Skywalker leads a bunch of Rebel X-wing fighters in an attack on the Imperial Death Star. As the fighters financial institution and roll towards the gargantuan spacecraft, you see laser weapons firing from each sides. Luke does some fancy flying, fires his weapons, lands his torpedo in the vent, and, with a loud explosion, the Death Star isn't any extra. This climactic scene from "Star Wars: Episode IV" is typical of many action science fiction films. It makes for an important movie going expertise, but is the science real? Could spacecraft actually transfer like this? Could you see laser blasts? Will we hear the deafening explosions? And will we care about any of these things? We'll reply the final question first: "Yes, positively!" Science is crucial to any work of science fiction