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)
Monday, August 5, 2013
Messenger, Departing
Today's Astronomy Picture of the Day shows the view the MESSENGER probe to Mercury saw as it used Earth as a slingshot eight years ago.
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