Yesterday (24-August-2016) there has been a lot of news about the newly discovered planet. I don’t have all the information yet, so I’m going to keep this article short.
Far as I can gather, this newly discovered planet is earth size and up to 1,3 earth size in orbit around Alpha Century Proxmia. This planet is tidal locked and it is my view that rules out life on the planet as one side of the planet gets always warmed up. This planet is also in a orbit around red dwarf, that means (as I see it) that the energy the planet gets on the surface is too little energy overall to keep water floating, or as water vapour. Radiation might also be a problem, given that Jupiter in our own solar system emits deadly ration and some of its moons cross that radiation barrier. That might also be the case in Alpha Century Proxima b. Destroying the possibly of life, even if it did not exist on the surface. This does not rule out atmosphere on the planet, what type of atmosphere it might hold is impossible to know.
There is a lot of question unanswered about the Alpha Century systems, both Alpha Century Ab and Proxima. There is a good chance there are more planets around Proxmia, even if they have not yet been discovered (due to distance from the central star). There might also be planets orbiting Ab stars in the Alpha Century system, even if they have not been discovered so far. I hope that new planets get discovered around Alpha Century star system once the James Webb Space telescope (Wikipedia) gets on-line in 2019, after being lunched in October 2018.