[Q&A+] Why Didn't NASA Just Build Another Kepler When It Failed?

BONUS QUESTION STARTS AT 09:07 Watch the video here (with no ads) or on YouTube: https://youtu.be/koZUXaCXpYA When Kepler failed, why didn't we just build another one? Do we know about all the potentially dangerous asteroids? Could one just come out of nowhere? And in Q&A+, which planets are more difficult to visit (the answer will surprise you)? 00:00 Intro 00:22 [@paulcockerill4260] Why didn't NASA build another Kepler? 05:16 [@SeanMann-o6v] Are the near earth asteroids all known? 09:07 [@davew1959] Which planets are easier to visit? 13:49 Final thoughts