What is the longitude of the north pole?
The North Pole is located directly on the top of the Earth. The longitude of the North Pole is 0 degrees.
No. All of the meridians of longitude converge at the poles. So the north pole is located at every longitude, and the distance between any two longitudes at the north pole is zero. The largest distance covered by a degree of longitude occurs along the equator, where the meridians are spread farthest apart. That's where one degree of longitude traverses about 111.22 km. (rounded)
What is the center point from which all meridians begin and is the north extremity of the earths axis?
No, The Equator is located halfway between the North and South Poles. Thus dividing the Earth into the Northern and Southern Hemispheres. The Prime Meridian and its counterpart, The International Date Line while dividing the Earth into it's Eastern and Western hemispheres runs vertical to the Equator. Think of a ball with a line around the middle, that is the Equator, now think of the exactly same ball with a line running from its top…