Each year, the Perseid meteor shower happens in August, as Earth travels through the remnant tail of Comet 109P/Swift-Tuttle. In November, when our planet moves through the remnants of Comet 55P/Tempel-Tuttle, we enjoy the Leonid meteor shower. These showers get their name from the location in the sky where all the meteors seem to originate, called the radiant. As their names suggest, the radiants of the Perseid and Leonid meteor showers are the constellations Perseus and Leo, respectively.