Exploration & Discovery
How Astronomers Search for Life on Exoplanets: A Guide to Biosignatures and Their Validation
Astronomers search for extraterrestrial life by identifying biosignatures in exoplanet atmospheres and on surfaces, but rigorous validation is crucial to distinguish true signs of life from abiotic processes. This involves analyzing the planetary context, host star properties, and atmospheric chemistry to rule out false positives.
Dr. Evelyn Reed·October 3, 2026
