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, November 20, 2018
Mystery Visitor
Today's Astronomy Picture of the Day is a short video showing the trajectory of asteroid 1I/2017 U1 'Oumuamua through and out of our solar system. The first known interstellar visitor, the asteroid seems to be wandering from the computed trajectory. Outgassing? Course correction?
Watch those skies!
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