Tag
#biosignature
2 posts
Exoplanet Atmospheres: How Webb Reads the Chemistry of Alien Worlds
When an exoplanet passes in front of its star, a fraction of starlight filters through the planet's atmosphere. Different molecules absorb different wavelengths, leaving a chemical fingerprint. JWST is already detecting water, CO2, and methane in worlds dozens of light-years away.
Biosignatures: How Scientists Would Recognize Life on Another World
If life exists on another planet, how would we know? We cannot visit most exoplanets, but we can analyze the light filtering through their atmospheres. A living biosphere leaves chemical fingerprints that dead chemistry alone cannot produce.