http://en.m.wikipedia.org/wiki/Rogue_planet
http://en.m.wikipedia.org/wiki/Oort_cloud
http://en.m.wikipedia.org/wiki/Great_Attractor
http://en.m.wikipedia.org/wiki/Zone_of_Avoidance
http://en.m.wikipedia.org/wiki/Supervoid
http://en.m.wikipedia.org/wiki/Dark_flow