(addendum, because I just thought of a more recent example:)

90% of the actual setting of the sprawling planetary system that
"Firefly" takes place in - its "Verse" - is, from what we currently know
about astronomy, utter bullshit.  I'm also at least 90% sure that Joss
Whedon *doesn't care*.  It's all just a backdrop for the Space Western
story(s) he wanted to tell.  Science only gets brought in when it serves
the plot and/or makes for a cool visual for television, like when a
character has to jury-rig a way to fire a gun in a vacuum.

So, decide whether your own stories are better served by having a
gigantic port facility where container stacks the size of apartment
blocks are assembled and ferried out to megaton freighters at the jump
limit, or the backwater train-station-I-mean-airport where most of the
locals, for lack of other excitement, turn out to meet the weekly mail
and passenger run.

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Kelly St. Clair
xxxxxx@efn.org