Guide to galaxy for Earth Hour's starry, starry night

(PhysOrg.com) -- When cities turn off their lights for Earth Hour their occupants will get more than a warm and fuzzy green feeling, they will also see stars hundreds of trillions kilometres away lighting up a moonless night sky in all its glory.

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<p><a href="http://www.physorg.com/news156627581.html">Guide to galaxy for Earth Hour's starry, starry night</a></p> <p>(PhysOrg.com) -- When cities turn off their lights for Earth Hour their occupants will get more than a warm and fuzzy green feeling, they will also see stars hundreds of trillions kilometres away lighting up a moonless night sky in all its glory.</p>