On September 11, 2013, an object with the mass of a small car hit the lunar surface in Mare Nubium, an ancient lava-filled basin with a darker appearance than its surroundings. The impact, the biggest seen to date, produced a bright flash and would have been easy to spot from the Earth. An image of the flash resulting from the impact of a large meteorite on the lunar surface on 11 September 2013, obtained with the 0.36-m-telescope in Sevilla, Spain....
