These great hollow globes of artificial super-metals, and artificial transparent adamant, ranged in size from the earliest and smallest structures, which were no bigger than a very small asteroid, to spheres considerably larger than the Earth. (Olaf Stapledon, STAR MAKER)
Sunday, April 16, 2017
Today's Astronomy Picture of the Day illuminates recent discoveries by the hard-working Cassini orbiter around Saturn. Does life lurk under the seas of Enceladus?