Thoth Technology is developing a microsatellite mission to investigate the atmospheres of extrasolar planets.

The Extrasolar Spectroscopy of Planets (ESP) mission will deploy a miniature orbiting instrument to detect oxygen and other gases in the atmospheres of extra-solar planets. The device will measure the combined emission from an extra-solar system; the planetary component will then be extracted in subsequent data analysis. The instrument will make observations in a spectral range where there is a strong oxygen absorption band. The detection of this absorption signature will be used to infer the presence of an oxygen-rich planetary atmosphere.

Argus will advance our capabilities in world-class space-science and exploration missions. Discoveries of biogenic atmospheric gases would contribute significantly to our understanding of the universe.