It's not the same, but several Apollo missions left behind retroreflectors, tri-corner reflectors like in car taillights, which can bounce back laser probes: h

It's not the same, but several Apollo missions left behind retroreflectors, tri-corner reflectors like in car taillights, which can bounce back laser probes: http://science.nasa.gov/science-news/science-at-nasa/2004/21jul_llr/ http://science.nasa.gov/science-news/science-at-nasa/2004/21... They are used to get precise earth-moon distances.