Cosmic Puzzles:
From the Last Scattering Surface to Large Scale Structures

A Ψ2 scientific program of the Paris-Saclay University
held at Institut d'Astrophysique Spatiale

July 2-27, 2018


A four week scientific program on the modern cosmology challenges to be held at Institut d'Astrophysique Spatiale and sponsored by the Ψ2 initiative of the Paris-Saclay University.

In this Ψ2 program we aim to bring together pioneering researchers to pose, explore, and answer paramount questions about the nature and evolution of our Universe.The Ψ2 programs bring scientists in a single location for a signficant amount of time. Unlike typical conferences, the daily schedule is composed of informal talks in the morning and open time for discussion and collaborative work in the rest of the day.

Topics explored

  • Week 1 : Where do cosmological magnetic fields come from, and what was their role in structuring the Universe?
  • Week 2 : How did we get out of the Dark Ages through Cosmic Reionisation?
  • Week 3 : Are the low redshift Universe and the high redshift Universe telling us a different story?
  • Week 4 : Where are the missing baryons at low redshifts and what are their properties?
Learn More


Each participant is provided with a desk in one of the offices adjacent to a lounge and a seminar room. The program favours open collaboration time, with only two talks per day, one in the morning and one in the afternoon.

On the Monday of each week, participant may be invited to give a 2 min. presentation, showing what they are interested in or working on. At the end of each week everyone is invited to present a few rough slides on what they did during the week.