Retrieved 24 July 2015. ↑ http://www.centauri-dreams.org/?p=31945 ↑ http://www.drewexmachina.com/2015/01/03/the-composition-of-super-earths/ ↑ http://www.eso.org/public/archives/releases/sciencepapers/eso1629/eso1629a.pdf ↑ Feroz, F.; Hobson, M. P. (2014).