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, May 20, 2019
Planes and Planets
Today's Astronomy Picture of the Day is a short video showing the relative tilts and spins of the major planets of our local system. Take a careful look at Uranus compared to the rest of the system. What happened there?
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