Astronomers have identified sulfur as a potentially crucial indicator in narrowing the search for life on other planets.
Significant concentrations of sulfur dioxide in a planet’s atmosphere can suggest that the planet is likely uninhabitable.
The James Webb Space Telescope and the upcoming Habitable Worlds Observatory face limitations in detecting biosignatures or assessing potentially habitable exoplanets.
Sulfur dioxide levels can help determine if a planet is likely a dry, hot world with little to no water or worth further observation for signs of water vapor and potential life.