On the night of November 12, 1799, people across the Americas looked up to find the sky going absolutely wild. Streaks of light tore across the darkness in every direction - not a few shooting stars an hour but thousands. A young German explorer named Alexander von Humboldt, camping in Venezuela, woke up his crew because the show was so dazzling. From the Caribbean to the eastern United States, sailors, farmers, and Indigenous villagers stepped outside and stared in awe, some convinced the stars were falling out of the heavens for good.
What they were watching is now called a Leonid meteor storm. Every 33 years or so, Earth crashes through a thicker stream of dust left behind by a comet called Tempel-Tuttle. The dust grains are mostly the size of sand and pebbles, but they slam into our atmosphere at about 158,000 miles per hour, burning up in brilliant streaks. They seem to shoot out of the constellation Leo, the lion, which is where the name Leonids comes from. In a normal year you might see 15 meteors an hour from the Leonids, but during a storm you can see thousands.
The 1799 storm was one of the first to be carefully written down by scientists, and Humboldt's notes helped future astronomers predict the next big storm in 1833 - when meteors fell so fast people compared them to snowflakes in a blizzard. The Leonids still return every November, sometimes quiet, sometimes spectacular. They are a reminder that Earth is a planet sailing through a dusty solar system, and that comets leave behind sparkling crumbs for us to fly through.
