More tweets against Light Pollution

That is pollution of the night sky by stray light, not light as opposed to heavy pollution…

Dark Skies 2010 is an online light pollution campaign group, operating through twitter (they tweet here). They have a map of Orion as seen with six different limiting magnitudes. They ask people to tweet #darkskies2010 and a number of stars equivalent to the limiting magnitude (ie give your view of Orion a number out of six for how clear it is with * = can hardly see it and ****** = crystal clear). The map and a full explanation is given here. The project will run until the 10th of April.

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