The Prime Meridian is complete as it appears on maps or globes. It forms a
half-circle, and isn't missing anything. When joined with the Prime Meridian,
the 180-degree meridian of longitude forms a complete great circle.
The longitude of every point on the Prime Meridian is Zero.
The prime meridian is the zero degree vertical longitude line on the globe of the Earth. An example sentence would be: She used to live close to the prime meridian.
The 180th meridian is on the other side, and the International Date Line generally follows the 180th meridian. (The Prime Meridian is the 0th meridian, with there being 360 lines of longitude across the globe)
meridian
Lines of longitude are referred to as meridians and appear as parallel lines on a globe. These lines converge at the poles and are evenly spaced around the globe from the Prime Meridian at 0 degrees to the 180th meridian.
The Prime Meridian is complete exactly as it appears on maps and globes. It forms a half-circle, and it isn't missing anything. When joined with the Prime Meridian, the 180-degree meridian of longitude forms a complete great circle.
The longitude of every point on the Prime Meridian is Zero.
The prime meridian is the zero degree vertical longitude line on the globe of the Earth. An example sentence would be: She used to live close to the prime meridian.
The 180th meridian is on the other side, and the International Date Line generally follows the 180th meridian. (The Prime Meridian is the 0th meridian, with there being 360 lines of longitude across the globe)
meridian
The Prime Meridian is complete just the way it's drawn on maps or globes. It's not missing anything. When the Prime Meridian is joined with the 180° meridian of longitude, the combination forms a single, complete great-circle.
Each line of longitude extends from one pole to the other, perpendicular to the equator. Along each meridian, the equator is 0° latitude, the north pole is 90° north latitude, and the south pole is 90° south latitude. The prime meridian, which is the meridian that passes through Greenwich, England, is 0° longitude, and the international date line, directly opposite the prime meridian, is 180° east or west longitude.
Like every other meridian, the Prime one only joins the poles,and forms a semi-circle.
A "prime meridian" is a line of longitude from which other longitude positions are calculated. The term "Prime Meridian" is currently applied to the Greenwich 0° line from which all other locations around the globe are measured (positioning and clock times), up to 180° east or west of that line.
The opposite of the Prime Meridian -- 180° East (or West) Longitude -- is traditionally referred to as the International Date Line, though substantial portions of the line deviate from the true meridian in order to accommodate geopolitical boundaries (countries).
Lines of longitude are referred to as meridians and appear as parallel lines on a globe. These lines converge at the poles and are evenly spaced around the globe from the Prime Meridian at 0 degrees to the 180th meridian.
Starting from the Prime Meridian and going either east or west, you'll cover 360 degrees of longitude before you find yourself back at the Prime Meridian again. Half-way around a sphere corresponds to 180 degrees. If you and your friend both start out from the Prime Meridian, and one of you travels east around the globe and the other travels west around the globe, you'll eventually meet each other. If you both travel exactly the same distance, then you each cover 180 degrees of longitude, and you meet exactly on the other side opposite the Prime Meridian, in the middle of the Pacific Ocean, at 180 degrees longitude, both east and west.