temps (durée) (2) radio (2) physique (2) recherche spatiale (2) Time (2) Space sciences (2) Radio (2) Physics (2) Outer space--Exploration (2) Mathematics (2) Mathematics (2) plasma (2) puits (1) science (1) région (1) champ (1) expérience scientifique (1) abords (agglomération) (1) taux (1) densité (1) Density (1) Observations (1) Observations (1) Northern Hemisphere (1) Will (1) Space vehicles (1) Series (1) Science (1) Plasma density (1) Orientation (1)