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, October 29, 2019
Digging for Gold
Today's Astronomy Picture of the Day shows MSL Curiosity poking around in the basin of Gale Crater on Mars as it trundles towards Mount Sharp. Here it is exploring a find of clay, signs that water may have once covered the floor of the crater.