It would be 9pm.
noon
they are
The Prime Meridian passes through Greenwich, England. It is designated as 0 degrees longitude and all other meridians are measured in degrees east or west of it. The Prime Meridian was established for navigation and is the basis on which International time is kept.
The time meridian is each standard time zone roughly centered on a line of longitude exactly divisible by 15 degrees and the prime meridian is the starting point for the standard time zones an arbitrary longitude line.
The Prime Meridian based on Greenwich, England, is at 0 degrees longitude and all other meridians are "X" degrees east or west of it. The Prime Meridian was established for navigation and is the basis on which International time is kept. The Prime Meridian joins the North and South Poles, and passes through England, France, Spain, Algeria, Mali, Burkina Faso, Togo and Ghana.
The Prime Meridian and 180° longitude are half-a-world apart.So 11 AM at 180° corresponds to 11 PM on the Prime Meridian.
noon
they are
No, it measures degrees. Longitude can measure time, but not from the equator but from the prime meridian
The Prime Meridian passes through Greenwich, England. It is designated as 0 degrees longitude and all other meridians are measured in degrees east or west of it. The Prime Meridian was established for navigation and is the basis on which International time is kept.
The time meridian is each standard time zone roughly centered on a line of longitude exactly divisible by 15 degrees and the prime meridian is the starting point for the standard time zones an arbitrary longitude line.
The Prime Meridian based on Greenwich, England, is at 0 degrees longitude and all other meridians are "X" degrees east or west of it. The Prime Meridian was established for navigation and is the basis on which International time is kept. The Prime Meridian joins the North and South Poles, and passes through England, France, Spain, Algeria, Mali, Burkina Faso, Togo and Ghana.
That would be zero degrees longitude.
The Prime Meridian
During Summer Time in Europe the prime meridian passes through three different time zones, UTC, UTC+1 and UTC+2.
It was chosen because, at the time England was the biggest country and superpower at the time. So the agreement was to run the prime meridian through Greenwich. It is also the closests to the middle of the earth's sphere.
It is the "Prime Meridian" or the "0 degree Meridian" which is the basis for calculating time in most of the world.