Neville J Would you be happier if the experiment did not use the Apollo XI LRRR device, but used instead the French device on the Russian Lunokhod? See - http://communications.uwo.ca/making_headlines/coverage/060327-3.htm Williams told Space.com that there are four laser retroreflector arrays on the moon that get ranged: the Apollo 11, 14, and 15 sites, plus the other Russian moonbuggy, Lunokhod 2. "As a result of the ranging, we know those positions to better than one-meter accuracy" or roughly 3 feet, he said. The arrays of 14 prisms on Lunokhods 1 and 2 were built by the French. The Lunokhod 2 retroreflector has been ranged, so the design works, Williams noted. for details. Paul D ____________________________________________________________________________________ Yahoo!7 Mail has just got even bigger and better with unlimited storage on all webmail accounts. http://au.docs.yahoo.com/mail/unlimitedstorage.html