180 degrees east and 180 degrees west of the Prime Meridian. Minutes ('): Each degree is divided into 60 minutes. Seconds ("): Each minute is divided into 60 seconds.
Precision in locating acupoints is not merely academic—it directly impacts clinical outcomes. For example, a study of 37 clinical trials for low-back pain found that the most frequently used points were , all located along the Bladder Meridian in the lumbar region . These points are defined using precise coordinates: e.g., BL23 is located 1.5 cun lateral to the lower border of the spinous process of the L2 vertebra .
Specific locations on the skin where Qi accumulates, which can be manipulated to influence the energy flow. meridian coordinates
Meridians are the direct basis for global time zones. As the Earth rotates 360° in 24 hours, it moves 15° of longitude each hour. Thus, the world is divided into 24 standard time zones, each roughly 15° wide, with the serving as the universal reference . The prime meridian's opposite line, at 180° longitude, defines the International Date Line —an artificial boundary where the calendar date changes .
Together, the Prime Meridian and the Antimeridian form a great circle that splits the Earth into the Eastern and Western Hemispheres. The Antimeridian serves as the general basis for the . When you cross this line, the calendar date shifts by one full day to accommodate the Earth's 24-hour rotation cycle. Formatting Meridian Coordinates 180 degrees east and 180 degrees west of the Prime Meridian
Unlike lines of latitude, which run parallel to each other and get smaller as they approach the poles, all meridians are great circles of equal length. They run vertically from the geographic North Pole to the geographic South Pole. Key Characteristics of Meridians
The concept is so fundamental that we apply it to any spherical body. When NASA lands a rover on Mars, they immediately define a . For Mars, the zero meridian passes through a small, easily identifiable crater named Airy-0 (named after the British Astronomer Royal who built the Greenwich telescope). Every other point on Mars is then given a meridian coordinate (east/west longitude) relative to that crater. Precision in locating acupoints is not merely academic—it
Every smartphone uses a receiver to calculate its position based on the intersection of latitude and meridian lines.
The concept of meridians extends far beyond Earth. Astronomers project Earth's coordinate grid onto the night sky to map stars, planets, and galaxies. The Celestial Meridian
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