Europans, although they might confuse them with Europeans
Martian
Venusian
Makemakian
Caspians
Ioians ioains ions
I guess the scientists would come up with a name. Though 'Mercurians' seem OK
Moors were medieval Muslim inhabitants of Northwest Africa. This is not a nationality available to living persons. Any attempt to claim "Moorish" as a nationality would be frivolous and unavailing.
Deimos, one of the two TINY moons of Mars, is far too small for anyone to live ON it. If any people ever settle the place, they will burrow inside and live IN it. Their nationality? Depends on who goes there. At the current pace, probably Chinese.
Minnesota is a state in the United States, so its "nationality" would be American.
europa Yes, europa is the brightest.
i would feel lucky that i am not Polish. Much of how you would feel would depend upon where you were and on your nationality/religion/etc.
The day time temperature in the Europa would be -160 degrees