To that end, a number of instruments designed to detect Earth-sized exoplanets have been considered, most notably NASA's Terrestrial Planet Finder (TPF) and ESA's Darwin programs, both of which have been cancelled.
Punika mawinan, makudang instrumen sané kawangun anggén mendeteksi planet ekstrasurya sané pateh agengnyané ring Bumi sampun kapinehang, utaminnyané program Pencari Planet Terestrial (TPF) NASA miwah program Darwin ESA, sané maka kalih sampun kakaonang.