Does it matter wether 可以 stands before or after time and place? In this sentence Duolingo didn't accept it if I put time and place after 可以, in some other sentences putting time or place before gets marked wrong.
可以 and 在这儿 can be swapped. Report it.
But that's just the place. Can 可以 be put before the time as well?
Is 见 also okay for "see"?
Why 可以 instead of 能 ?
能 i think conveys more the sense of a possibility, more like "it is permitted", as opposed to 可以 which means more like "may"
Can 这里 be used in place of 这儿?
Yes， they have the same meaning
Why not 能?
is 晚上这里我们可以看很多星星 acceptable?
As far as a very strict grammatical structure goes, it would be technically incorrect to put 可以 before 这儿, though it can be done to change emphasis
I don't see what's wrong with: wo men wan shang ke yi zai zhe er kan jian hen duo xing xing. :/
*ke yi before wan shang
it does sound a little weird to but the 可以 in front of the 这儿 to be honest. What you can do (but incorrectly gets flagged as wrong) is to put the 这儿 in front (although I would prefer it to be 这里).