Pro Laser

Is This Green Laser Good?

I am about to buy a 30mW and 532nm, green laser pointer. Apparently it can go over 1 kilometer and is an astronomers laser point so its good for pointing at stars/planets.

I was wondering if anyone knew laser pointers and could tell me if this is a decent laser pointer.
All I really want to do with it is, point at objects far far away.

So could anyone tell me if this is a decent laser pointer, what are the pros and cons of this green 30mw laser pointer. I know its not a pro laser pointer, I just want to know what it would be like to own this pointer.

Lastly I want to know what exactly is nm and is 532nm good for this laser pointer?

nm is nanometres, a billionth of a metre. 532nm is green.

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