Portal:Solar System/Did you know/6


 * ...that the Caloris Basin on Mercury, one of the largest impact basins in the Solar System, is surrounded by a series of geological formations believed to have been produced by the basin's ejecta?


 * ...that Kordylewski clouds are large concentrations of dust that orbit Earth at the distance of the Moon?


 * ...that no viable solution has yet been found to counteract radiation from space, which is a serious threat to astronauts on any future mission to Mars?


 * ...that Claudia Alexander was the last project manager of NASA's Galileo mission to Jupiter?