Supposedly N.A.S.A. is going to send a spaceship full of astronauts to Proxima Centauri b, which is 4.2 light years aways from the Earth, in 2069. However, I seriously doubt that it will come to fruition that soon. Interstelar travel is too dangerous to be something that we'll achieve in this century. Elon Musk had originally planned to send a spaceship full of astronauts to Mars in 2030, and now he has postponed it until the 2050s. He likely realized that it was easier said than done.
RE: Discover new exoplanet in the habitable area.