ExSS IV: Welcome!


Greetings from the fourth Extreme Solar Systems (ExSS) meeting, held in Reykjavik, Iceland! This week, I will be writing updates on just a few of the talks at the meeting. The usual posting schedule for AAS Nova will resume next week.

What’s ExSS?

This conference is the fourth in a series that started in 2007 as an opportunity for exoplanet theorists, observers, and instrumentation developers to gather and discuss both our exoplanet discoveries over the past decades and what we can expect in the future.

The conference has reconvened every roughly four years, and the meeting in Iceland is drawing an impressive attendance of astronomers from around the world. Roughly 600 participants will be gathering in Reykjavik, and the full meeting program includes over 100 talks and nearly 400 posters! The program is broken down into broad categories related to exoplanet study, including the following sessions:

  • New Discoveries
  • Planet Formation
  • Direct Imaging
  • Atmospheres
  • Radial Velocities
  • Population Statistics & Mass-Radius Relations
  • Transits
  • Planets in and around Binaries
  • Dynamical Evolution
  • Planets around White Dwarfs
  • Ultrashort Periods and Planet-Star Interactions
  • Disks
  • Stellar Spins and Obliquities
  • Habitability and Biosignatures
  • Transiting Multi-planet Systems
  • Future Missions


I’ll do my best to bring you highlights from as many sessions as I can!


The many attendees of ExSS IV are ready for the first day of the conference. [AAS Nova]