EGU23-8270, updated on 25 Feb 2023
EGU General Assembly 2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Exo-Venus, Exo-Earth, Exo-Dead in the Trappist-1 System?

Michael Way
Michael Way
  • NASA, Goddard Institute for Space Studies, New York, United States of America (

Since the discovery of the Trappist-1 system a number of studies have explored which of these planets are within the canonical habitable zone with Trappist-1e the most likely Exo-Earth-like of the bunch [e.g. 1,2,3,4]. At the same time they also tend to indicate that Trappist-1d is likely an exo-Venus.  Using the ROCKE-3D General Circulation Model [5] we investigate whether Trappist-1d is likely to be an Exo-Venus, an Exo-Earth, or is a bare rock (Exo-Dead). We apply our previous approach to understand the climate history of Venus [6] to explore Trappist-1d.

[1] Wolf, E.T. (2017) ApJ 839:L1

[2] Turbet et al. (2018) A&A 612, A86

[3] Krissansen-Totton, J. and Fortney, J.J. (2022) PSJ 933:115

[4] Kane, S.R. et al. (2021) AJ 161:53 

[5] Way, M.J. et al. (2017) ApJS 213:12

[6] Way, M.J. and Del Genio, A.D. (2020) JGR Planets, 125, e2019JE006276

How to cite: Way, M.: Exo-Venus, Exo-Earth, Exo-Dead in the Trappist-1 System?, EGU General Assembly 2023, Vienna, Austria, 24–28 Apr 2023, EGU23-8270,, 2023.