Highlight the stars with a green laser pointer

So you're out watching the stars with your best fella, and you want to swear a romantic vow that whenever you're both under Vega of the Lyre, you'll be thrilled to the core with thinking goofily of the other.  But he skipped astronomy class that day so he doesn't know Vega of the Lyre from Bellatrix of Orion.  So you whip out your green laser pointer (£75 including VAT but plus P+P, from Edinburgh Instruments) and use it like a cosmic highlighter.  (Or you use it to point out a particular piece of bling you'd like him to put on your tiny finger, as demonstrated with the picture here from ThinkGeek.

Green laser pointers (not to be confused with laser turntables) are about fifty times as powerful as red laser pointers (so don't humorously zap people in the eye with them) and where with the red pointer you just see a dot, with the green you see an actual beam of brilliant green light.  This is why the green ones cost about fifty times as much as the red ones.  A good green laser pointer has a range of over 2 and a half kilometers - nearly ten thousand feet.  So you could go a third of the way up Mount Everest and still use it to light up your keys which you foolishly locked in the car at base camp.  [GT]