The moon is about 240,000 miles away from the earth (384,400 km).
	Light Speed - Light travels at 186,000 miles per second (300000 kilometers per second).
	Light Year - 5,865,696,000,000 miles (9,460,800,000,000 kilometers).
	186,000 miles/second * 60 seconds/minute * 60 minutes/hour * 24 hours/day * 365 days/year = 5,865,696,000,000 miles/year
	Image Source: NASA (Public Domain)
	http://antwrp.gsfc.nasa.gov/apod/ap010906.html