Factual error: When they are trying to navigate the shuttle through Eadu, the shuttle abruptly collides with a rock, which causes Bodhi to jolt backwards. If the shuttle hitting the rock had caused the shuttle reduce speed so abruptly, in the way that was shown, then Bodhi would have jolted forwards, not backwards. (00:57:05)
Factual error: After the Death Star, when TIE fighters are attacking the Millennium Falcon, each time one explodes at high speed, the debris and the fire does not keep moving.
Factual error: A piece of ship that size crash landing into a planet and not being destroyed would be an extinction level event. The asteroid that supposedly killed the dinosaurs was a lot smaller.
Factual error: There are three major mistakes regarding gravity in the escape sequence in the asteroid field. Han and Chewie take the Millennium Falcon to refuge on an asteroid that, while visually huge, is still far too tiny to have sufficient gravity to allow humans to walk in anything like a normal fashion; yet, they walk normally both inside and outside of the ship. They also do not use pressurized suits outside of the ship, even though the asteroid's gravity should be far too weak to accumulate any significant atmospheric pressure; they use oxygen masks, but their blood should have boiled in near-zero atmospheric pressure. Finally, and most ridiculously, they fly straight down the giant cave worm's throat and land on the side of its throat (this is obvious in the shot where the Millennium Falcon lifts off and heads toward the toothy exit), and they get out and walk around on the side of its throat, which would mean the asteroid's gravity was impossibly perpendicular to its mass. (00:57:50)
Suggested correction: However, size isn't everything. The more mass an object has, the greater its gravitational field will be. Nothing is known of the asteroid's composition. It could have a high mass, resulting in a higher gravity than an equivalently sized body of lower mass. This would also address the atmosphere issue. Also, there is no evidence that the throat was vertical when they landed on it. Clearly, the creature was further down the tunnel perpendicular to the surface, then changed position as they flew out.
Factual error: In the introduction, when text flows across the screen, the words "ten thousand solar systems" appear. Strictly speaking, there is only one Solar system - ours. A star with planets is a "star system", our star is called "Sol", hence, the Solar System. This trivial error is made in many sci-fi films, BUT the Star Wars series has never fallen into this error before. Remember Episode IV, where Leia says something like, "The more you tighten your grip, the more star systems will slip through your fingers" (and that's only one example). So why has George Lucas allowed such a trivial but irksome error to be made here? [Some people have debated this point, saying that "Solar" from the Latin "Sol", can mean any star system, but it's backed up in the Isaac Asimov book "Nemesis". He knows a thing or two about sci-fi, and in the book a new star is discovered and called Nemesis, and its system is referred to as the "Nemetic system", as opposed to our own "Solar system".] (00:00:55)
Factual error: In the opening sequence, the camera pans down on a planet and moon that are three-quarters lit in sunlight (with the sun being far off-camera to the left). A battlecruiser then crosses the images as a silhouette, eclipsing the planet and moon in total blackness. Impossible. The battlecruiser should have been lit three-quarters in sunlight, same as the planet and the moon. Stranger yet, as the stormtrooper shuttles are deployed and cross over the battlecruiser silhouette, the shuttles are illuminated. (00:01:55)