http://chandra.harvard.edu/learn_cosmology.html

Chandra Observatory (@chandraxray) tweetou às 8:59 PM on sex, Dez 28, 2012: Cosmology: The study of the origin and evolution of the universe as a whole. Learn more: http://t.co/ImFPbKgp (https://twitter.com/chandraxray/status/284765601191297024) Baixe o aplicativo oficial do Twitter em https://twitter.com/download