- Phone numbers for the Paris Observatory :
01 40 51 XX
- Phone numbers for the Meudon Observatory :
01 45 07 XX
- Phone numbers for the Sorbonne University :
01 44 27 XX
- Phone numbers for the University of Cergy Paris :
01 34 25 XX
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01 40 51 XX
01 45 07 XX
01 44 27 XX
01 34 25 XX