Finally, another Star Trek post.....

Being a big Trek fan, I guess I had always assumed as you initially did - that the idea was that the Genesis planet was Ceti Alpha 5, just terraformed and made habitable, which would have had an existing sun. But thinking more about that movie and the scenes at the end, the explanation that is was instead created out of the nebula (plus the crippled USS Reliant piloted by Khan) is correct.

I'll grant that does raise the issue of what sun was out there, but I don't think this is really that much of a plot hole given all the sci-fi "liberties" taken in Trek in general.

And it doesn't change the fact that Wrath of Khan is a great movie, while Search for Spock is a bad one.

Another plot hole I think everyone missed.

Bourne Identity. (First one)

Jason Bourne puts his top secret red spy bag in a train station locker. It has all his passports, cash in different currencies etc...

Upon exiting the train station RIGHT AFTER he put his spy case away he is chased by bad guys in an exciting and elaborate car chase scene and finally he and the girl make it out of town...

Where they go directly to a farm house in the country, where Bourne has to take out an assassin who finds them there.

And guess what Bourne has?

His red bag with the money. You know the one he locked in the city train station the day before and never went back to retrieve.

I suppose some would call it a continuity error.

That one mistake totally ruined the whole movie for my wife. And the whole trilogy even...

Oh and another error.... In the beginning, the fisherman cut Bourne's clothes off of him.

And then later you see him put on his sweater, with bullet holes in the shoulder. You know, the one the fisherman had cut off in the beginning of the movie.

Aaaaargh.