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)
Tuesday, December 3, 2013
Rho Ophiuchi
Today's Astronomy Picture of the Day shows the gaseous and dust clouds of the Rho Ophiuchi region. Off to one side is Messier 4, a globular cluster.
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