The Leonids are produced when Earth passes through the debris left behind by comet 55P/Tempel-Tuttle during its highly elliptical orbit around the sun every 33 years. The Leonids are considered ...
The Leonids result from the Earth passing through the trail of the comet Tempel-Tuttle (55P/Tempel-Tuttle), which was first discovered in 1865. But meteor shower predates that: The 1833 event is ...