Dear colleague,

We are pleased to send you the Third Circular of the “Horizon 2061 synthesis workshop” that will be organized by IRAP and OMP in Toulouse from September 11th to 13th, 2019, and to invite you and your colleagues to actively participate to this meeting. The objectives, contents and components of the “Planetary Science, Horizon 2061” long-term foresight exercise are presented in our conference website https://h2061-tlse.sciencesconf.org/ and in the attached circular.

The main objective of the Horizon 2061 long-term community foresight exercise is to progressively build with YOUR inputs and YOUR ideas the contours of the four “pillars” of planetary exploration:

– the important science questions that planetary exploration addresses;
– the broad spectrum of space missions that need to be flown to address these science questions;
– the enabling technologies that we will need to master in the coming decades to fly these missions;
– the technical infrastructures and services, space-based and ground-based, that will be needed to support the planetary exploration missions and maximize their science return.

The Horizon 2061 exercise is implemented in three successive steps. Its third step, the “Horizon 2061 synthesis workshop”, is organized by IRAP and OMP and will be hosted on the Toulouse Aerospace Campus from September 11th to 13th, 2019. Its tentative conclusions will be presented for discussion at the joint EPSC-DPS meeting in Geneva (Horizon 2061 oral session on september 20th, 2019, 8:30 to 10:00), in preparation for the writing of a multi-author book gathering its conclusions to which you are kindly invited to contribute.  This bood and the conclusions it carries will be presented for discussion and final approval at the COSPAR General Assembly in Sydney, Australia (August 15th to 23rd, 2020).

We have chosen to schedule our workshop just before the EPSC-DPS meeting in Geneva (September 16-20). Knowing that travel from Toulouse to Geneva can be done in one-hour direct flights, this should facilitate participation to the two events and decrease travel costs.

We hope you will be able to participate and look forward to the pleasure of greeting you in Toulouse next september! If you do so, we kindly ask you to create an account and register at: https://h2061-tlse.sciencesconf.org/registration. (early registration rates will be available until July 22nd, 2019) and to prepare an abstract and submit it at https://h2061-tlse.sciencesconf.org/index/unauthorized after you have identified yourself.

With our best regard,

Michel Blanc and the Local Organization Committee of the Toulouse Horizon 2061 Synthesis workshop.