Forum Programme (pdf) >>
Tuesday, September 2
09:00 Welcome by Conveners
09:15 Welcome by ISSI
09:30 Introduction Round 1
10:30 Coffee Break
11:00 Introduction Round 2
12:00 Lunch
13:30 Session 1 – Populations – What do we know about the current architecture of the outer solar system? – Introduction by chair (Rosita Kokotanekova, Raphael Marschall)
13:35 Talk by Wes Fraser
13:50 Talk by Kat Volk
14:05 Talk by Ruth Murray-Clay
14:20 Discussion
14:50 Summary
15:00 Coffee Break
15:30 Session 2 – Planet Instability Models, Planet X Hypothesis and Rogue planet: How did planets get onto their orbits and what are the consequences of that? – Introduction by chair (Sean Raymond)
15:35 Talk by Yukun Huang
15:50 Talk by Pedro Bernardinelli
16:05 Discussion
16:50 Summary
17:00 Icebreaker Welcome Drink at ISSI
Wednesday, September 3
09:00 Morning Discussion Round
09:30 Session 3 – Influence of stellar flybys: What role did the stellar and galactic environment play in shaping the outer solar system populations? – Introduction by chair (Susanne Pfalzner)
09:35 Talk by Simon Portegies Zwart
09:50 Talk by Coryn Bailer-Jones
10:05 Discussion
10:50 Summary
11:00 Coffee Break
11:30 Session 4 – Oort Cloud: What do Oort Cloud comets reveal about the solar system dynamical evolution? – Introduction by chair (Daniel Hestroffer)
11:35 Talk by Arika Higuchi
11:50 Talk by Melaine Saillenfest
12:05 Discussion
12:50 Summary
13:00 Lunch
14:30 Session 5 – Effects of evolution: What processes have been at play in different areas of the solar system and which properties of the objects have they determined or altered? – Introduction by chair (Rosita Kokotanekova)
14:35 Talk by Raphael Marschall
14:50 Talk by Aurélie Guilbert-Lepoutre
15:05 Discussion
15:50 Summary
16:00 Coffee Break
16:30 Session 6 – JWST Observations – What key evidence on the outer solar system formation have the first JWST programs already brought? – Introduction by chair (Aurélie Guilbert-Lepoutre)
16:35 Talk by Silvia Protopapa
16:50 Talk by Will Grundy
17:05 Discussion
17:50 Summary
18:00End of Day 2
Thursday, September 4
09:00 Morning Discussion Round
09:30 Session 7 – Surface properties of all populations (colors, albedo, phase fn, etc): What does the diversity of the observed surface properties within the different populations reveal about the outer solar system history? – Introduction by chair (Wes Fraser)
09:35 Talk by Rosemary Pike
09:50 Talk by Matthew Belyakov
10:05 Discussion
10:50 Summary
11:00 Coffee Break
11:30 Session 8 – Physical properties of all populations: What does the distribution of physical properties constrained for the various properties reveal about the processes that shaped the outer solar system? – Introduction by chair (Aurélie Guilbert-Lepoutre)
11:35 Talk by Audrey Thirouin
11:50 Talk by Ying-Tung Chen
12:20 Discussion
12:50 Summary
13:00 Lunch
14:30 Session 9 – Future observational tests: What can we learn from the surveys, observational programs and space missions already planned and which other observational tests should be prioritized? – Introduction by chair (Matthew Belyakov)
14:35 Talk by David Trilling
14:50 Talk by Marc Buie
15:05 Discussion
15:50 Summary
16:00 Coffee Break
16:30 Final Discussion
17:30 End of the Forum
last update: September 1, 2025