The Earth in its orbit around the sun travels through the Leonid meteoroid stream every year on November 17. They are called Leonids because the streaks the meteors make in the sky all seem to come from one location on the sky, and that location is in the constellation Leo. Most meteor showers are named for the constellation from which they appear to radiate. The visible display of a natural object from space, burning up as it enters the Earth's atmosphere. On a typical clear, dark night any time during the year, a person on the ground who pays attention to the sky for an hour or so can expect to see five to ten meteors.
Meteors occur fairly high up in the atmosphere.
Leonid meteors usually start around 120 kilometres above the ground and end about 70 kilometres above the ground. A large number of meteors seen from the Earth's surface, all caused by meteoroids that belong to the same meteoroid stream. Because the meteoroids in a meteoroid stream are all coming from pretty much the same direction in three-dimensional space, the meteors in a meteor shower seem to come from the same spot on the sky, as seen by an observer on the surface of the Earth, and shoot outward from that spot. During a meteor shower, a person on the ground who pays attention to the sky for an hour or so can expect to see more than thirty meteors, and sometimes more than a hundred meteors. During a meteor storm, a person on the ground who pays attention to the sky for an hour or so could see as many as a thousand meteors or more, sometimes as many as 100,000 meteors.