180 degrees
180°
180 degrees
180 of them.
The Midnight Meridian refers to the line of longitude directly opposite the Prime Meridian, marking the halfway point between the International Date Line and the Prime Meridian. It is where each calendar day begins.
No. That would be the International Date Line.The Prime Meridian is defined as zero longitude.
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.
Prime meridian, International Date Line, time zones
The IDL roughly follows the meridian of 180° longitude.
The Prime Meridian. Opposite Prime Meridian (180-degrees Longitude) is The International Date Lin.
-- The "Prime Meridian" marks zero longitude. -- The "180th meridian" marks 180° longitude. The International Dateline is either on or relatively near the 180th meridian at any given latitude on it.
If you travel to any place that is half-a-globe around the earth from the Prime Meridian, you'll be located at longitude 180 degrees. If you're expecting to find a line there, you'll be disappointed. There is no line there.
By international agreement, the Prime Meridian is defined as zero longitude, and it's the one from which all other longitudes are measured.