The prime meridian encircles the entire earth, which means it is the same length as the earth's circumference, which is 24,901.55 miles.
!80 degrees east of Greenwich and then one crosses over to West Longitude
One. Longitude is derived from the Prime Meridian. Values are measured in relation to this Prime Meridian as East or West longitude. If you withdraw this constant, Prime, then values are given in Positive, Zero, and Negative. The distance between degree's of longitude are also not exact from top to bottom. At the equator they are approx. 69 miles wide, as you go toward the poles they become smaller, with an example being at a Latitude of 45 degree's a degree of longitude is approx: 49miles wide. These can also be more specific in Minutes and Seconds. A good reference to obtain a better understanding would be: http://nationalatlas.gov/articles/mapping/a_latlong.html
12PM is commonly used improper terminology. There is no such thing. If you see it in print it is wrong and you may have to use context to determine what the writer meant. The abbreviations AM and PM stand for Ante Meridian and Post Meridian, respectively. The terms ante and post mean before and after. The term meridian refers to when the sun is at the middle of its arc across the sky. Nominally the sun is at its meridian at noon. Since it is *at* its meridian this is neither before nor after the meridian. It *is* the meridian. Likewise, midnight is neither 12 AM nor 12 PM. It is equally far from both. It is simply 12 midnight. The military clock is better than the civilian clock for many reasons. One is that eliminates the complexity of specifically accounting for whether a time is before of after midnight. On the military clock noon is read as 1200 hours, and midnight is read as 2400 hours.
"Morning." The abbreviations AM and PM stand for Ante Meridian and Post Meridian, respectively. The terms ante and post mean before and after. The term meridian refers to when the sun is at the middle of its arc across the sky. Nominally the sun is at its meridian at noon. Since it is *at* its meridian this is neither before nor after the meridian. It *is* the meridian. Likewise, midnight is neither 12 AM nor 12 PM. It is equally far from both. It is simply 12 midnight. The military clock is better than the civilian clock for many reasons. One is that eliminates the complexity of specifically accounting for whether a time is before of after midnight. On the military clock noon is read as 1200 hours, and midnight is read as 2400 hours.
The earth travels about 584,020,178 miles (939,889,369 km) in the course of its orbit about the sun.
The prime meridian goes through London at Greenwich.
The prime meridian encircles the entire earth, which means it is the same length as the earth's circumference, which is 24,901.55 miles.
The Prime Meridian is an imaginary semicircle that joins the Earth's north and south poles. As such, it's roughly 12,400 miles long, and extends through a range of 180 degrees of latitude. The longitude of every point on the Prime Meridian is zero.
The Royal Observatory, Greenwich, is in London about 7 miles from the center of town.
No. The equator is a full circle all the way around the Earth ... about 24,900 miles (40,074 kilometers). The Prime Meridian is a semi-circle between the north and south poles ... about 12,409 miles (19,970 kilometers).
Mexico City is 99.133333 degrees west of the Prime Meridian
The Prime Meridian is defined as the origin of longitude. The longitude of every point on it is zero.
The prime meridian (designated as zero) runs from pole to pole, passing through the Greenwich Observatory, London, England. Lines of longitude to the east of the prime meridian are so many degrees east, and to the west of the Prime Meridian are so many degrees west.
Botswana occupies the whole range of longitudes from 20° to 29.3° East of the Prime meridian.
six
About six miles.
The Greenwhich meridian also Prime Meridian is 0 degrees longitude and International Date Line roughly follows the 180° longitude or antimeridian. The antimeridian is the meridian which is 180° east or west of the Prime Meridian.