Question: how many planets have been discovered so far by the kepler and k2 projects?
Answer: On May 16, 2014, NASA announced the approval of the K2 extension. By January 2015, Kepler and its follow-up observations had found 1,013 confirmed exoplanets in about 440 star systems, along with a further 3,199 unconfirmed planet candidates. Four planets have been confirmed through Kepler's K2 mission.