Q: Are celestial poles the two imaginary points in the sky where the Earth's axis of rotation? ¶
A: Yes, and indefinitely extended, intersects the celestial sphere.
Q: Is a celestial pole visible only from the southern hemisphere? ¶
A: Yes.
Q: Are celestial poles the points in the sky where the projection of the planet's axis of rotation intersects the celestial sphere? ¶
A: Yes.