International Date Line
Alaska
The Prime Meridian
The International Date Line is located near Homer, Alaska.
-- Each meridian ( 'line' ) of longitude represents all of the infinite number of points on the Earth's surface that have that one specific longitude. -- Each parallel ( 'line' ) of latitude represents all of the infinite number of points on the Earth's surface that have that one specific latitude.
The only US state that intersects with 150 west longitude is Alaska. Alaska's longitude spans from 130°W to 172°E. Alaska's border include a series of islands falls into the eastern hemisphere but the International Date Line (IDL) was drawn west of 180° to keep the whole state within the same legal day.
Alaska is in both the Western hemisphere and Easter hemisphere. Alaska's Aleutian Islands stretch across the 180º line of Longitude, which divides the Earth into Eastern and Western hemispheres. BarDev
This longitude cuts right through the heart of Alaska and through French Polynesia. It also cuts through a part of Antarctica.
The state of Alaska extends over all longitudes between 172.5° east to 130° west. The meridian of 150° west crosses the state. No other state in the US has any territory at that longitude.
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The Prime Meridian is a line of longitude, and it sits at 0 degrees longitude.
The longitude of a point on earth is the angle, east or west, between that point and a certain reference line on the earth. If you take a globe or a map and draw a line through all the points that have exactly the same longitude, the line you get is the meridian of that longitude. The reference line is the meridian of zero longitude, called the "Prime Meridian". On that line are all the points on earth that have zero longitude. The line joins the north and south Poles, and passes through the Royal Observatory at Greenwich, a suburb of London.
Every north latitude between 54.65 - 71.38 degrees, including the Arctic Circle, as well as every west longitude between 130.02 - 180 degrees and every east longitude between 172.45 - 180 degrees, traverses the state of Alaska.