No home in the galactic outer suburbs

The lack of protective dust in the outskirts of the Milky Way makes an Earth-type planet there unlikely

http://feeds.newscientist.com/c/749/f/10898/s/652d9a5/l/0L0Snewscientist0N0Carticle0Cmg20A3272740B90A0A0Eno0Ehome0Ein0Ethe0Egalactic0Eouter0Esuburbs0Bhtml0DDCMP0FOTC0Erss0Gnsref0Fspace/story01.htm