Premise: La City de l'Espace (exit 17 or 18 from the ring road; m??tro Marengo) is a huge space complex, with a planetarium and a park laid out like the solar system, dominated by a replica of the Ariane rocket in whose control room you can prepare for launch and watch the deployment of a satellite.

Hypothesis: The planetarium is only open at weekends.
Relation: neutral