I am an astrophile and want a green laser for star-pointing. in photonlexicon forum, guys remind me that laser pointers with high power is dangerous and advise me to ask for opinoins in this forum. i find one with less power and much lower price 5mW 532nm Green Laser Pointer Pen compared with the previous one. but the point is if one with low power can be used for star-pointing. Is it bright enough or can it shot that far?