“Star Wars” has been filling science-fiction fans’ heads with ideas of how technology could evolve in the future since 1977.

Some of these ideas have been made a reality, such as holograms, heads-up displays and bionic appendages, according to Gadget Review.

But what about actual light sabers or traveling at light speed?

What about interplanetary travel to other galaxies?

What about droids and cyborgs like those we’ve seen throughout the franchise?

While fans may think it’s all possible in due time with technological advancements, scientists with knowledge of the inner workings of our universe disagree.

Jeffrey Dick, THB columnist and National Science Foundation Graduate Research Fellow in the Center for Electrochemistry at the University of Texas at Austin, was asked what he thought of the technology featured in the “Star Wars” franchise.

Light sabers: Impossible!

“Light sabers are usually thought to be some pretty high-powered lasers. Because light has no mass, it would be pretty hard to make something out of light that could be used as a sword.

“Besides, this would require a type of reflector on the end of the saber to reflect the laser beam back. Another problem is the amount of power that would have to go into a laser of meaningful use.

“For instance, the use of plasma could be a possibility, but that requires temperatures like those on the sun. Can you imagine hooking your little saber into a nuclear reactor just to use it? Doesn’t sound very safe.”

Light speed: Impossible!

“According to Einstein’s General Theory of Relativity, which has been upheld through many experiments, reaching the speed of light is not feasible.

“Say you’re traveling along in a spaceship and approaching the speed of light — Einstein’s theory predicts that your mass would start to approach infinity and time would start to approach zero. Can you imagine what zero time is like?

“It’s the same with gravity. Black holes are thought to have an infinite gravitational field, which means that not even light can escape them (hence, ‘black’ hole). According to Einstein’s theory, time stops in a black hole. Time stops. What could that be like?”

Interplanetary travel: Possible.

“With the best spaceships we have now, hopping over to Mars in eight months is completely possible. However, it’s a different story when we talk about other solar systems.

“The closest star is Alpha Centauri, which is about 93 million miles (4 light years) away. A light year is the distance that light will travel in one year.

“Want to know something cool? That means that the light that we see now from Alpha Centauri is really a depiction of what Alpha Centauri was like 4 years ago. Because we can’t go the speed of light, reaching this solar system might be possible in a lifetime.

“In Star Wars, wrinkles in the fabric of space-time (wormholes) are used to travel through the universe. Is this possible? Perhaps, but the jury’s still out on that one.”

Human-like robots and droids: Possible … maybe.

“Artificial intelligence has been heavily pursued and debated; however, in the grand scheme of things, we are probably pretty far away from that.

“Ever since fantastic stories like “I, Robot” by Isaac Asimov, people have gained a lot of interest in whether or not human-like robots, capable of feeling empathy and love and desire and shame, are actually possible.

“Of course, we also run into many ethical issues as to how we may control and treat these robots. We must remember that nature has spent millions and millions of years, through processes of trial and error, crafting life the way it is now.

“It would be presumptuous to believe that the task would be simple. As far as I know, there are no physical laws that prohibit this from occurring; however, even in humans, we don’t know what physically causes feelings of impulse and whimsy. If we don’t understand it ourselves, it’s going to be pretty hard to recreate in a computer.”