Stupid Question

Hello All,
Not really an amateur - more like a casual observer with an interest -
please forgive the intrusion.

I've been watching the Cassini stuff, and something struck me that
I've never really thought too much about before, so I'm hoping this
isn't the proverbial stupid question!

When I see these images of planets within our solar system, why do I
never see stars in the backdrop (at least that I can remember?)

I've seen images of Pluto at distance, shown as a smudge in a
starfield, so that one's obvious. But when I see pictures of the moon,
for instance, I can't remember ever really seeing stars adjacent.

Do they just crop them out, is the light too great, do they just
happen to choose photographs that have no stars in them for
aesthetics, etc.

Or, if I'm wrong, and just haven't seen the right pictures (I'm
getting your National Geographic and Mars Rovers and Cassini type
images - stuff from NASA and friends), could someone maybe direct me
to a good site?

TIA
Steve