Trappist 1 e
Trappist-1 e is an exoplanet found orbiting the nearby red dwarf star Trappist-1, in 2017.[1][2][3]
In September 2025 spectroscopic measurements performed the James Web Space Telescope ruled out that Trappist-1 e was like either Planet Mars or Planet Venus.[4]
References
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Alicia Cermak (2017-02-23). "TRAPPIST-1 e". NASA Science. Archived from the original on 2026-06-03. Retrieved 2026-07-07.
TRAPPIST-1 e is a terrestrial exoplanet that orbits an M-type star. Its mass is 0.692 Earths, it takes 6.1 days to complete one orbit of its star, and is 0.02925 AU from its star. Its discovery was announced in 2017.
- ↑ "What is Webb Revealing About the TRAPPIST-1 System?". NASA Science. 2026-01-15. Archived from the original on 2026-05-12. Retrieved 2026-07-07.
- ↑
"10 Things: All About TRAPPIST-1". NASA Science. 2018-02-20. Retrieved 2026-07-07.
The star we today call TRAPPIST-1 was first discovered in 1999 by astronomer John Gizis and colleagues. At that time, the ultra-cool dwarf star got the unwieldy name 2MASS J23062928-0502285, because it was spotted with the Two Micron All-Sky Survey (2MASS).
- ↑
Paige Colley (2025-09-08). "Study finds exoplanet TRAPPIST-1e is unlikely to have a Venus- or Mars-like atmosphere". MIT News. Retrieved 2026-07-07.
In an open-access paper published today in The Astrophysical Journal Letters, astronomers used JWST to take a closer look at the atmosphere of the exoplanet TRAPPIST-1e, located in the TRAPPIST-1 system. While they haven’t found definitive proof of what it is made of — or if it even has an atmosphere — they were able to rule out several possibilities.