Swift-tuttle

Perseid meteors, caused by debris left behind by the Comet Swift-Tuttle, began streaking across the skies in late July and will peak on August 12.

Source: tatoeba (7058398)

The Perseids occur when Earth enters the debris field left behind by the comet Swift-Tuttle.

Source: tatoeba (8125235)

The Perseids are fragments of the comet Swift-Tuttle, which orbits between the Sun and beyond the orbit of Pluto once every 133 years.

Source: tatoeba (10244295)

Every year, the Earth passes near the path of the comet, and the debris left behind by Swift-Tuttle shows up as meteors in our sky.

Source: tatoeba (10244296)