LOM v1.0atomicLOM v1.01URLhttp://portal.discoverthecosmos.eu/node/193316enToday most city skies have become virtually empty of stars. Light pollution obscures the stars, interferes with astronomical observatories, and, like any other form of pollution, disrupts ecosystems and has adverse health effects. Join the fight against light pollution with the Dark Skies Rangerslight pollution dark skies rangersLOM v1.0final1.0LOM v1.0author2012-04-08Babak TafreshiLOM v1.0publisher2012-04-08Rosa DoranenLOM v1.0LOM v1.0creator2012-04-08Rosa DoranLOM v1.0validatorLOM v1.0browserLOM v1.0anyLOM v1.0osLOM v1.0anytext/htmlhttp://portal.discoverthecosmos.eu/node/193316LOM v1.0noLOM v1.0noLOM v1.0expositiveLOM v1.0very lowLOM v1.0very easyLOM v1.0LOM v1.00.25 didactic hour12-1515-1818-2525+LOM v1.0DisciplineScienceAstronomy: StarsAstronomy: Universe - generally