CHENGDU, China — A city has come up with an interstellar proposal to replace street lights.
Chengdu is developing a plan to launch an artificial moon that would orbit about 300 miles above earth.
The city says the man-made moon would be eight times brighter than the real moon and would save $240 million in electric bills.
Others wonder how having two moons would affect sleep patterns and animal behavior.
The tentative date for the launch is 2020.
