Perseids meteor shower over toadstool rock formations at Toadstool Geological Park in northwestern Nebraska - stock photo

Perseids meteor shower over toadstool rock formations at Toadstool Geological Park in northwestern Nebraska. The Perseids meteor shower occurs once a year in August and is associated with the comet Swift–Tuttle. The meteors are called the Perseids because the radiant point from which they appear lies in the constellation Perseus. During peak nights between thirty and sixty meteors can occur each hour.