[u]Eternal Beauty[/u]: Explains itself.
[u]Momentary Beauty[/u]: Something beautiful which will not last for long.
I personally think it's momentary beauty.
[u]EDIT[/u]: Editing this to be a bit more specific.
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Art can't be defined since what constitutes art differs from person to person. Attempting to quantify a visual medium will never work. Your poll wasn't as deep and intriguing as you thought it was, and this post was nigh on hipster douchebaggery pretension.