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Lasers do have one neat use in astronomy. When showing one or more people with binoculars the brighter deep sky objects, just point to any of the Orion Nebula, Eta Carina, Omega Centauri, Andromeda galaxy etc and tell them to follow the beam with their binoculars. They all say "Wow" when they locate the objects, especially when you've previously shown them those objects in a telescope.
Only problem is that at the end of the night, they are often more impressed with the laser light itself, than with the objects.
Regards,
Renato
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