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)
Thursday, July 10, 2014
Noctilucent Clouds
Today's Astronomy Picture of the Day shows noctilucent clouds over the skies of London. Plus a giant wheel that has been featured in a couple of episodes of Doctor Who.
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