What does this have to do with ecology based agriculture? Nothing really! But its a MAJOR discovery. Alpha Centauri B is a component of the closest star system to the sun at just over 4ly away. Since terrestrial planets usually come in groups this means that there could be other planets in the system, some of which may be in the habitable zone. Don't get too excited though. Even our fastest spacecraft would still take thousands of years to get there. We have a long way to go before we have the technology to explore this new world and its possible companions.
http://www.sciencedaily.com/releases/2012/10/121016184436.htm
http://www.sciencedaily.com/releases/2012/10/121016184436.htm
