The Institut d'Astrophysique Spatiale in Orsay

The PIS2 program "The Interstellar Medium Beyond Three Dimensions" is hosted by the Institut d'Astrophysique Spatiale located on the Paris-Sud University campus in the town of Orsay, about 25 km south-west of Paris.

The Orsay campus is conveniently connected to the city center, to the two Paris airports (Charles de Gaulle and Orly) and to two major train stations (Gare du Nord and Massy TGV) through the RER B, one of the lines of the Paris area local train system (RER - Réseau Express Régional).

The Orsay campus can be reached from Chatelet (center of Paris) in 35 minutes.

Getting on the Paris RER-B line

  • By air
    • Charles de Gaulle airport. Connected to RER-B line
    • Orly airport. Take the Orlyval light rail line to Antony (on the RER B line).
  • By train
    • Gare du Nord (Eurostar, Thalys). Connected to RER-B line.
    • Gare de l'Est, Gare Saint-Lazare, Gare Montparnasse, Gare d'Austerlitz. Take the subway to reach the RER B line. See RATP.
    • Massy TGV train station. Connected to the RER B line.
  • By subway
    In the city center, the RER is interconnected with the subway system (look here if you dare !). The two systems can be combined with a single ticket.

Reaching the Institut d'Astrophysique Spatiale

  • Once on the RER-B, take a train that terminates at Saint-Rémy-les-Chevreuse. Check the electronic boards on the RER plateform.
  • Get off at Orsay-ville station.
  • Walk to IAS (8 min walk) :
More maps here