520 550 551 appliedearthsciences astronomy astrophysics astrophysicsandcosmology astrophysicsandcosmologyastronomy earthsciences extraterrestrialphysics fluid-andaerodynamics foundations general geoengineering geographicalinformationsystems/cartography geographicinformationsystems geography geology geophysics/geodesy geotechnicalengineering hydraulicengineering hydraulics hydrogeology imageandspeechprocessingsignal landscape/regionalandurbanplanning physicalgeography physics planetaryscience plasma(ionizedgases) plasmaphysics popularscienceinastronomy qc801-809 regionalplanning softwareengineering solarsystem spacesciences spacesciencesextraterrestrialphysics