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