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A meteor shower is a celestial event in which a number of meteors are observed to radiate from one point in the night sky. These meteors are caused by streams of cosmic debris called meteoroids entering Earth's atmosphere at extremely high speeds on parallel trajectories.
A meteor shower occurs when the Earth passes through the trail of debris left by a comet or asteroid. 2. Meteors are bits of rocks and ice ejected from comets as they move in their orbits about the sun. ... Approximately 30 meteor showers occur each year that are visible to observers on Earth.
A number of meteors that appear to radiate from one point in the sky at a particular date each year, due to the earth regularly passing through them at that position in its orbit.