Stars in the sky of a region that is in the Tropic of Cancer?

Question

Are there any circumpolar stars in the Tropic of Cancer?
And are there any stars that we can never see?

Answer 1

Are you asking if there are any stars in the sky over the Tropic of Cancer that are circumpolar? Possibly, it depends on where you are when you look at them.
Are you asking if you can see circumpolar stars from the Tropic of Cancer, yes, but they will be low on the horizon and difficult to see.
In general, your latitude is reflected by how many degrees above the horizon the pole is (I am referring to the north pole in general, but the same works for the south pole). Any star that will pass between the horizon and the pole (in the west to east direction) are generally called circumpolar and is dependent on where you stand.
On the equator, no stars are circumpolar. At the north pole, all stars are circumpolar. At 23 degrees latitude, all stars within 23 degrees of the pole are circumpolar.