Glossary of Commonly Used Terms and Abbreviations in the 100th Anniversary Debate 
 biosignature: 
A biological marker of life.
For example, DNA. 
 Drake Equation: 
A simple equation used to estimate 
the abundance of intelligent and communicative life in our galaxy
 exoplanet: 
A planet orbiting a distant star.
 HabEx: 
Habitable Exoplanet Imaging Mission
 IR:  
Infrared
 JWST:  
James Webb Space Telescope
 Kepler:  
Kepler space telescope
 LUVOIR: 
Large UltraViolet Optical Infrared Surveyor
 Optical: 
Visible light that humans can see.
 SETI: 
Search for ExtraTerrestrial Intelligence
 technosignature: 
A technological marker of advanced life. 
For example, a broadcasted radio signal.
 TESS: 
Transiting Exoplanet Survey Satellite
 UV: 
UltraViolet
 WFIRST:  
Wide Field Infrared Survey Telescope
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