EntityQ1166026· pop 9· linked from 179 articlesEPE-ASign in to saveformer American research satelliteConnectionsExplorers ProgramEntitySunConceptaluminiumEntityNASAConceptelectronEntityprotonEntitymagnetic fieldEntitypublic domainEntitycosmic radiationEntityΥEntitysolar windEntityGreenwich Mean TimeEntityelectronvoltEntitysolar cellEntityorbital periodEntityapsisEntityEarth's magnetic fieldEntityVan Allen radiation beltEntityorbital inclinationEntityExplorer 1EntityCategoriesEnergetic Particles ExplorerExplorers ProgramSource attributionSpacecraft launched in 1961