How long did it take to build the Kepler mission?

Answer 1

The Kepler mission, launched by NASA in March 2009, took about four years to develop, with significant work beginning in the early 2000s. The project involved extensive design, testing, and assembly phases, culminating in its launch. The mission was designed to discover Earth-sized planets in the habitable zones of stars by observing the transit method. Kepler operated until 2018, significantly advancing our understanding of exoplanets during its mission.