Extra Giant Planet May Have Dwelled in Our Solar System http://www.space.com/13584-extra-giant-planet-solar-system.html If that were the case, then where did they go?! The article also states that "a large number of free-floating worlds have recently been discovered in interstellar space, . . . ". I know that extrasolar planets have been detected, but around other stars, and there are small objects beyound Neptune and Pluto, but free planets traveling among the stars?! From SwRI - http://swri.org/9what/releases/2011/giant-planet.htm [Broken] http://earthsky.org/space/was-a-fifth-gas-giant-ejected-from-our-solar-system An article is supposed to be published in The Astrophysical Journal Letters this month, but I haven't found it.