The statistics for these tables come from the Survey of Income and Program Participation, a national survey designed to provide comprehensive details about the social and economic well-being of individuals and households. Other highlights include: 1  Child support payments averaged $5,150 annually, or $430 per month. 2  About 85 percent of child support providers were male and 15 percent were female. 3  Annual child support payments averaged $5,450 from male providers and $3,500 from female providers.
The time-averaged distance between Earth and Moon centers is 385,000.6 km (239,228.3 mi). The actual distance varies over the course of the orbit of the Moon, from 356,500 km (221,500 mi) at the perigee to 406,700 km (252,700 mi) at apogee, resulting in a differential range of 50,200 km (31,200 mi). Lunar distance is commonly used to express the distance to near-Earth object encounters.
The Moon is Earth's nearest neighbor. It orbits the Earth at an average distance of approximately 240,000 miles (384,000 km). The Moon completes an orbit of the Earth every 27.3 days (approximately 655 hours). The Moon also rotates on its axis.