http://en.wikipedia.org/wiki/Twin_star_system#Planets http://en.wikipedia.org/wiki/Twin_star_system#Planets says »Simulations have shown that the presence of a

http://en.wikipedia.org/wiki/Twin_star_system#Planets http://en.wikipedia.org/wiki/Twin_star_system#Planets says »Simulations have shown that the presence of a binary companion can actually improve the rate of planet formation within stable orbital zones«