The first of 21 fragments from Comet Shoemaker-Levy crashes into Jupiter. They reach speeds of 60 km/s! The impact temperatures are 23,700°C, as measured by the Galileo probe orbiting Jupiter. It’s also the 25th anniversary of the first lunar landing, and Neil Armstrong himself mentions it in a speech marking the occasion. Eugene Shoemaker, one of the three discoverers of the comet, had also been an instructor for the Apollo astronauts during the geology portion of their mission.
