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, October 6, 2014
A Closer Look
Today's Astronomy Picture of the Day is a view of the International Space Station (including docked multiple spacecraft), focusing on the Alpha Magnetic Spectrometer. What explains the "excess" positrons that the AMS has been detecting?
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