Infrared Space Interferometer

Infrared Space Interferometer (IRSI) was Cornerstone Mission in the European Space Agency's Horizon Plus initiative, one of the principal goals of which will be to search for and characterize Earth-like exoplanets. Among the leading proposed designs had bees Darwin. Final selection of the Interferometer Cornerstone was to have been made in about 2000; however, the project was subsequently shelved.