By what stretch of the imagination is this a "snippet"?
Did you even read Where should I post X?
Looking @ it from a _great_ (no; I mean really great. Greater than that even...) distance this looks just like a snippet...
I like what your doing - even though you posted it in the wrong place... ;->
Adding some configuration mechanism seems like something you want to do since all your checks are now hard coded and most can quite easily become soft coded.
There is no Extraterrestrial life
There aren't any suitably capable Extraterrestrials
Interstellar travel is too difficult
We're too uncool / not worth the trouble
What do you mean they haven't visited?
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