We turned a popular science book into a visually stunning and entertaining experience accessible to everyone #darkapp http://t.co/F0BZE9GlZN

#CharlieHebdo #NotAfraid #JeSuisCharlie #JeSuisAhmed http://t.co/Hntzr0Po5C

Expected sampling of @ESAGaia over the Milky Way. Credits and details at cosmos.esa.int/web/gaia/news_… http://t.co/CLwgrPLBdA

Today’s @apod illustrates what astronomers in the 19th century used to call ‘Dark Matter’ http://t.co/C4OKqrQM6o