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, August 25, 2013
Arps in Collision
Today's Astronomy Picture of the Day shows Arp 271, an interacting pair of galaxies. Interacting means "colliding" in this case. For more on Halton Arp, the man behind the Arp Catalog, take a look here.
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