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)
Wednesday, November 14, 2018
In Plato's Cave
Today's Astronomy Picture of the Day brings us an image of Sh2–155, better known as The Cave Nebula. A combination of sulfur, hydrogen and oxygen bring us the rich colors (as does the fine work of the photographer!) together in a phrase I've noticed several times of late: the Hubble Palette.
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