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Gigameter or gigametre is equal to 1,000,000,000 meters or 106 meters (unit of length), comes from a combination of the metric prefix giga (G) and the SI unit of length meter (m). Plural name is gigameters.
Lunar distance (LD), also called Earth–Moon distance, Earth–Moon characteristic distance, or distance to the Moon, is as a unit of measure in astronomy. It is the average distance from the center of Earth to the center of the Moon.