Detecting Alien Terraforming: Greenhouse Gases as Technosignatures
New research suggests potent greenhouse gases could reveal advanced civilizations modifying distant planets.
- Scientists identify five artificial greenhouse gases detectable by telescopes like the James Webb Space Telescope.
- These gases, including sulfur hexafluoride, have extreme warming potential and long lifespans.
- Finding such gases in exoplanet atmospheres may indicate technological activity and terraforming efforts.
- The study focused on the TRAPPIST-1 system, a group of rocky planets 40 light-years away.
- Researchers highlight the potential of current and future telescopes to detect these technosignatures.
Space.com 
Astronomy Magazine 