🌐EnglishEnglishFrançaisItalianoTiếng ViệtРусский中文日本語EntityQ5336608· pop 5· linked from 29 articlesEddington–Finkelstein coordinatespair of coordinate systems for a Schwarzschild geometry, adapted to radial null geodesicsConnectionsBlack holeConceptgeneral relativityEntityCategoriesCoordinate charts in general relativity