The Challenge: Plant a flag on this planet, Proxima Centauri!   Its the nearest real possibly habitable planet located near Alpha Centauri, about 4 lightyears  distance which is made accessible by Alternatively use Centauri Dreams Updated to: https://www.dropbox.com/s/spyd3qnc6ppnocn/CentauriDreams.zip?dl=0 Although Alpha Centauri is our closest neirbour, traveling 4 light years though the interstellar medium might be further than you think The main cons