Meridians Geography Jun 2026

: Every meridian is half of a "great circle." When paired with its opposite (anti-meridian), it forms a full circle that divides the Earth into two equal halves. Key Meridians

Meridians: The Invisible Lines That Shape Our World When you look at a globe or a digital map, you’ll see a crisp grid of lines crisscrossing the oceans and continents. While the horizontal lines (latitudes) act like rungs on a ladder, the vertical ones—the —are what allow us to pin down our exact location on Earth and, perhaps more importantly, tell the time. meridians geography

For centuries, different nations used their own "prime" meridians (often running through their own capital cities). However, in 1884, an international conference in Washington, D.C., established the line passing through the , as the official Prime Meridian for the world. From this line, the world is divided into two hemispheres: Eastern Hemisphere: 0° to 180° East. Western Hemisphere: 0° to 180° West. Why Meridians Matter 1. Pinpoint Navigation : Every meridian is half of a "great circle

The Earth rotates 360° every 24 hours. If you divide 360 by 24, you get 15. This means that for every 15 degrees of longitude you travel east or west, the solar time changes by exactly one hour. This relationship between meridians and rotation is why we have standard . 3. The International Date Line For centuries, different nations used their own "prime"

: The internationally recognized starting point for longitude.