Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field unknown
Is Reference of Hjulpet af tyngdekraften-da#Sense
Swing by-en#Sense
Gravicélération-fr#Sense
Aceleração gravítica-pt#Sense
Gravity assist-en#Sense
Gravidéviation-fr#Sense
Ελιγμός επωφελούμενος από την πλανητική έλξη-el#Sense